diff --git a/src/tools/Movemap-Generator/CMakeLists.txt b/src/tools/Movemap-Generator/CMakeLists.txt
index 84ee5bcb..e879f30e 100644
--- a/src/tools/Movemap-Generator/CMakeLists.txt
+++ b/src/tools/Movemap-Generator/CMakeLists.txt
@@ -68,6 +68,10 @@ else()
   target_link_libraries(${EXECUTABLE_NAME} ACE)
 endif()
 
+if(UNIX)
+  target_link_libraries(${EXECUTABLE_NAME} rt)
+endif()
+
 target_link_libraries(${EXECUTABLE_NAME} g3dlite vmap detour recast zlib shared)
 
 #Output the compiled exes to build/bin/$(Configuration)/tools directory on windows by default
diff --git a/src/tools/vmap-assembler/CMakeLists.txt b/src/tools/vmap-assembler/CMakeLists.txt
index 18ec426b..aa52e904 100644
--- a/src/tools/vmap-assembler/CMakeLists.txt
+++ b/src/tools/vmap-assembler/CMakeLists.txt
@@ -49,6 +49,10 @@ else()
     target_link_libraries(${EXECUTABLE_NAME} ACE)
 endif()
 
+if(UNIX)
+  target_link_libraries(${EXECUTABLE_NAME} rt dl)
+endif()
+
 target_link_libraries(${EXECUTABLE_NAME} vmap g3dlite zlib)
 
 set(EXECUTABLE_LINK_FLAGS "")