diff --git a/Recast/Source/RecastMeshDetail.cpp b/Recast/Source/RecastMeshDetail.cpp
index 5cc2adf..2fe070b 100644
--- a/Recast/Source/RecastMeshDetail.cpp
+++ b/Recast/Source/RecastMeshDetail.cpp
@@ -507,15 +507,9 @@ static float polyMinExtent(const float* verts, const int nverts)
 	return rcSqrt(minDist);
 }
 
-inline int next(int i, int n)
-{
-	return (i+1) % n;
-}
-
-inline int prev(int i, int n)
-{
-	return (i + n-1) % n;
-}
+// Last time I checked the if version got compiled using cmov, which was a lot faster than module (with idiv).
+inline int prev(int i, int n) { return i-1 >= 0 ? i-1 : n-1; }
+inline int next(int i, int n) { return i+1 < n ? i+1 : 0; }
 
 static void triangulateHull(const int nverts, const float* verts, const int nhull, const int* hull, rcIntArray& tris)
 {