diff --git a/vcg/complex/complex.h b/vcg/complex/complex.h
index 0b7b7226..8618bdd1 100644
--- a/vcg/complex/complex.h
+++ b/vcg/complex/complex.h
@@ -27,6 +27,7 @@
 
 #include <assert.h>
 #include <string>
+#include <cstring>
 #include <vector>
 #include <set>
 #include <stack>