diff --git a/src/BulletCollision/CollisionShapes/btMiniSDF.cpp b/src/BulletCollision/CollisionShapes/btMiniSDF.cpp
index f11daee12..968830062 100644
--- a/src/BulletCollision/CollisionShapes/btMiniSDF.cpp
+++ b/src/BulletCollision/CollisionShapes/btMiniSDF.cpp
@@ -2,7 +2,7 @@
 
 
 #include "LinearMath/btAlignedObjectArray.h"
-
+#include <string.h> //memcpy
 
 struct btSdfDataStream
 {
diff --git a/src/BulletCollision/CollisionShapes/btMiniSDF.h b/src/BulletCollision/CollisionShapes/btMiniSDF.h
index 221b3494e..51985d33b 100644
--- a/src/BulletCollision/CollisionShapes/btMiniSDF.h
+++ b/src/BulletCollision/CollisionShapes/btMiniSDF.h
@@ -79,7 +79,7 @@ struct btShapeGradients
 		}
 	}
 	
-	inline double&       operator()(int i, int j)
+	inline btScalar&       operator()(int i, int j)
 	{
 		return m_vec[i][j];
 	}