diff --git a/include/yap_structs.h b/include/yap_structs.h
index 146d7002a..f942ac594 100755
--- a/include/yap_structs.h
+++ b/include/yap_structs.h
@@ -48,7 +48,7 @@ typedef struct AtomEntry *YAP_Atom;
 #if _WIN64
 typedef unsigned long long YAP_CELL;  
 
-typedef unsigned long long int  YAP_UInt;
+typedef unsigned long long  YAP_UInt;
 
 #else
 typedef long int  YAP_Int;