diff --git a/src/OpenMesh/Core/Geometry/VectorT.hh b/src/OpenMesh/Core/Geometry/VectorT.hh
index f61c6df2..b3795fdb 100644
--- a/src/OpenMesh/Core/Geometry/VectorT.hh
+++ b/src/OpenMesh/Core/Geometry/VectorT.hh
@@ -58,6 +58,7 @@
 #include <iostream>
 #include <assert.h>
 #include <math.h>
+#include <string.h>
 
 #if defined(__GNUC__) && defined(__SSE__)
 #include <xmmintrin.h>