diff --git a/DebugUtils/Source/DebugDraw.cpp b/DebugUtils/Source/DebugDraw.cpp
index 9256992..655695d 100644
--- a/DebugUtils/Source/DebugDraw.cpp
+++ b/DebugUtils/Source/DebugDraw.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <string.h>
 #include "DebugDraw.h"
 #include "DetourMath.h"
diff --git a/DebugUtils/Source/RecastDebugDraw.cpp b/DebugUtils/Source/RecastDebugDraw.cpp
index c1a73a1..466c5b1 100644
--- a/DebugUtils/Source/RecastDebugDraw.cpp
+++ b/DebugUtils/Source/RecastDebugDraw.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include "DebugDraw.h"
 #include "RecastDebugDraw.h"
diff --git a/DebugUtils/Source/RecastDump.cpp b/DebugUtils/Source/RecastDump.cpp
index 5810899..6988095 100644
--- a/DebugUtils/Source/RecastDump.cpp
+++ b/DebugUtils/Source/RecastDump.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdio.h>
 #include <stdarg.h>
diff --git a/DetourCrowd/Source/DetourCrowd.cpp b/DetourCrowd/Source/DetourCrowd.cpp
index 3f0311f..d7cdae0 100644
--- a/DetourCrowd/Source/DetourCrowd.cpp
+++ b/DetourCrowd/Source/DetourCrowd.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <string.h>
 #include <float.h>
 #include <stdlib.h>
diff --git a/Recast/Source/Recast.cpp b/Recast/Source/Recast.cpp
index f921dfc..56e824f 100644
--- a/Recast/Source/Recast.cpp
+++ b/Recast/Source/Recast.cpp
@@ -20,7 +20,6 @@
 #include "RecastAlloc.h"
 #include "RecastAssert.h"
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <string.h>
 #include <stdio.h>
diff --git a/Recast/Source/RecastArea.cpp b/Recast/Source/RecastArea.cpp
index 97139cf..07fb021 100644
--- a/Recast/Source/RecastArea.cpp
+++ b/Recast/Source/RecastArea.cpp
@@ -17,7 +17,6 @@
 //
 
 #include <float.h>
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <string.h>
 #include <stdlib.h>
diff --git a/Recast/Source/RecastContour.cpp b/Recast/Source/RecastContour.cpp
index 1293d4f..57f3981 100644
--- a/Recast/Source/RecastContour.cpp
+++ b/Recast/Source/RecastContour.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <string.h>
 #include <stdio.h>
diff --git a/Recast/Source/RecastLayers.cpp b/Recast/Source/RecastLayers.cpp
index acc97e4..d5eb06a 100644
--- a/Recast/Source/RecastLayers.cpp
+++ b/Recast/Source/RecastLayers.cpp
@@ -17,7 +17,6 @@
 //
 
 #include <float.h>
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <string.h>
 #include <stdlib.h>
diff --git a/Recast/Source/RecastMesh.cpp b/Recast/Source/RecastMesh.cpp
index ea09ee1..9bffd6d 100644
--- a/Recast/Source/RecastMesh.cpp
+++ b/Recast/Source/RecastMesh.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <string.h>
 #include <stdio.h>
diff --git a/Recast/Source/RecastMeshDetail.cpp b/Recast/Source/RecastMeshDetail.cpp
index 40bfc9b..40f5b8c 100644
--- a/Recast/Source/RecastMeshDetail.cpp
+++ b/Recast/Source/RecastMeshDetail.cpp
@@ -17,7 +17,6 @@
 //
 
 #include <float.h>
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <string.h>
 #include <stdlib.h>
diff --git a/Recast/Source/RecastRasterization.cpp b/Recast/Source/RecastRasterization.cpp
index b7f0a10..2a4f619 100644
--- a/Recast/Source/RecastRasterization.cpp
+++ b/Recast/Source/RecastRasterization.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdio.h>
 #include "Recast.h"
diff --git a/Recast/Source/RecastRegion.cpp b/Recast/Source/RecastRegion.cpp
index 4831868..4a7e841 100644
--- a/Recast/Source/RecastRegion.cpp
+++ b/Recast/Source/RecastRegion.cpp
@@ -17,7 +17,6 @@
 //
 
 #include <float.h>
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <string.h>
 #include <stdlib.h>
diff --git a/RecastDemo/Source/ConvexVolumeTool.cpp b/RecastDemo/Source/ConvexVolumeTool.cpp
index 0917341..61c6fbd 100644
--- a/RecastDemo/Source/ConvexVolumeTool.cpp
+++ b/RecastDemo/Source/ConvexVolumeTool.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/RecastDemo/Source/CrowdTool.cpp b/RecastDemo/Source/CrowdTool.cpp
index 0f45ef4..7f9f784 100644
--- a/RecastDemo/Source/CrowdTool.cpp
+++ b/RecastDemo/Source/CrowdTool.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/RecastDemo/Source/InputGeom.cpp b/RecastDemo/Source/InputGeom.cpp
index fc6af82..50b72c1 100644
--- a/RecastDemo/Source/InputGeom.cpp
+++ b/RecastDemo/Source/InputGeom.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdio.h>
 #include <ctype.h>
diff --git a/RecastDemo/Source/MeshLoaderObj.cpp b/RecastDemo/Source/MeshLoaderObj.cpp
index 38e6c4c..21959ce 100644
--- a/RecastDemo/Source/MeshLoaderObj.cpp
+++ b/RecastDemo/Source/MeshLoaderObj.cpp
@@ -20,7 +20,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <cstring>
-#define _USE_MATH_DEFINES
 #include <math.h>
 
 rcMeshLoaderObj::rcMeshLoaderObj() :
diff --git a/RecastDemo/Source/NavMeshPruneTool.cpp b/RecastDemo/Source/NavMeshPruneTool.cpp
index 7260614..75b7e1f 100644
--- a/RecastDemo/Source/NavMeshPruneTool.cpp
+++ b/RecastDemo/Source/NavMeshPruneTool.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/RecastDemo/Source/NavMeshTesterTool.cpp b/RecastDemo/Source/NavMeshTesterTool.cpp
index dbd41d2..9f81c9f 100644
--- a/RecastDemo/Source/NavMeshTesterTool.cpp
+++ b/RecastDemo/Source/NavMeshTesterTool.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/RecastDemo/Source/OffMeshConnectionTool.cpp b/RecastDemo/Source/OffMeshConnectionTool.cpp
index 5abdfc7..99b814c 100644
--- a/RecastDemo/Source/OffMeshConnectionTool.cpp
+++ b/RecastDemo/Source/OffMeshConnectionTool.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/RecastDemo/Source/Sample.cpp b/RecastDemo/Source/Sample.cpp
index 2b5a7a2..2cafa9c 100644
--- a/RecastDemo/Source/Sample.cpp
+++ b/RecastDemo/Source/Sample.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdio.h>
 #include "Sample.h"
diff --git a/RecastDemo/Source/SampleInterfaces.cpp b/RecastDemo/Source/SampleInterfaces.cpp
index a9fd3ae..24f6ea1 100644
--- a/RecastDemo/Source/SampleInterfaces.cpp
+++ b/RecastDemo/Source/SampleInterfaces.cpp
@@ -1,4 +1,3 @@
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdio.h>
 #include <stdarg.h>
diff --git a/RecastDemo/Source/Sample_Debug.cpp b/RecastDemo/Source/Sample_Debug.cpp
index d842e64..6dc6c14 100644
--- a/RecastDemo/Source/Sample_Debug.cpp
+++ b/RecastDemo/Source/Sample_Debug.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdio.h>
 #include "Sample_Debug.h"
diff --git a/RecastDemo/Source/Sample_SoloMesh.cpp b/RecastDemo/Source/Sample_SoloMesh.cpp
index 2dd1af1..f9f7dc9 100644
--- a/RecastDemo/Source/Sample_SoloMesh.cpp
+++ b/RecastDemo/Source/Sample_SoloMesh.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/RecastDemo/Source/Sample_TempObstacles.cpp b/RecastDemo/Source/Sample_TempObstacles.cpp
index 4dd4e5f..294372b 100644
--- a/RecastDemo/Source/Sample_TempObstacles.cpp
+++ b/RecastDemo/Source/Sample_TempObstacles.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/RecastDemo/Source/Sample_TileMesh.cpp b/RecastDemo/Source/Sample_TileMesh.cpp
index 42fe307..c45122e 100644
--- a/RecastDemo/Source/Sample_TileMesh.cpp
+++ b/RecastDemo/Source/Sample_TileMesh.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/RecastDemo/Source/imgui.cpp b/RecastDemo/Source/imgui.cpp
index be72c39..8402201 100644
--- a/RecastDemo/Source/imgui.cpp
+++ b/RecastDemo/Source/imgui.cpp
@@ -18,7 +18,6 @@
 
 #include <stdio.h>
 #include <string.h>
-#define _USE_MATH_DEFINES
 #include <math.h>
 #include "imgui.h"
 
diff --git a/RecastDemo/Source/imguiRenderGL.cpp b/RecastDemo/Source/imguiRenderGL.cpp
index 9f05375..f81b13e 100644
--- a/RecastDemo/Source/imguiRenderGL.cpp
+++ b/RecastDemo/Source/imguiRenderGL.cpp
@@ -16,7 +16,6 @@
 // 3. This notice may not be removed or altered from any source distribution.
 //
 
-#define _USE_MATH_DEFINES
 #include <cmath>
 #include <cstdio>
 #include "imgui.h"
diff --git a/RecastDemo/Source/main.cpp b/RecastDemo/Source/main.cpp
index 90c6dbb..6e6fe49 100644
--- a/RecastDemo/Source/main.cpp
+++ b/RecastDemo/Source/main.cpp
@@ -17,7 +17,6 @@
 //
 
 #include <cstdio>
-#define _USE_MATH_DEFINES
 #include <cmath>
 
 #include "SDL.h"