--- clipper-2.1.20140911/clipper/core/spacegroup_data.h.old	2016-06-19 17:17:24.000000000 -0400
+++ clipper-2.1.20140911/clipper/core/spacegroup_data.h.old	2016-06-19 17:17:54.219117806 -0400
@@ -56,9 +56,9 @@ 
     // ASU function pointer
     typedef bool (*ASUfn)( const int&, const int&, const int& );
     // Spacegroup data record
-    struct SGdata { int sghash; const char* hall; const char* hm; char ext; int num; };
+    struct SGdata { unsigned sghash; const char* hall; const char* hm; char ext; int num; };
     // Laue group data record
-    struct LGdata { int lghash; ASUfn asufn; const char* lgname; };
+    struct LGdata { unsigned lghash; ASUfn asufn; const char* lgname; };
 
     // data tables
     extern LGdata lgdata[];