diff --git a/src/BulletCollision/Gimpact/btGenericPoolAllocator.h b/src/BulletCollision/Gimpact/btGenericPoolAllocator.h
index e883bcd23..dc8143124 100644
--- a/src/BulletCollision/Gimpact/btGenericPoolAllocator.h
+++ b/src/BulletCollision/Gimpact/btGenericPoolAllocator.h
@@ -23,7 +23,7 @@ subject to the following restrictions:
 
 #include <limits.h>
 #include <stdio.h>
-#include <memory.h>
+#include <string.h>
 #include "LinearMath/btAlignedAllocator.h"
 
 #define BT_UINT_MAX UINT_MAX
diff --git a/src/BulletCollision/Gimpact/gim_memory.h b/src/BulletCollision/Gimpact/gim_memory.h
index fa99eebb6..ef396c807 100644
--- a/src/BulletCollision/Gimpact/gim_memory.h
+++ b/src/BulletCollision/Gimpact/gim_memory.h
@@ -34,7 +34,7 @@ email: projectileman@yahoo.com
 
 
 #include "gim_math.h"
-#include <memory.h>
+#include <string.h>
 
 #ifdef PREFETCH
 #include <xmmintrin.h>	// for prefetch