diff --git a/vcg/container/simple_temporary_data.h b/vcg/container/simple_temporary_data.h
index f47d5110..2e3adfb9 100644
--- a/vcg/container/simple_temporary_data.h
+++ b/vcg/container/simple_temporary_data.h
@@ -49,6 +49,7 @@ First Working Release (with this comment)
 #define __VCGLIB_SIMPLE__
 
 #include <limits>
+#include <assert.h>
 #include <vector>
 #include <cstring>