diff --git a/include/wx/xrc/xmlres.h b/include/wx/xrc/xmlres.h
index 23cbea1c51..035ba9c711 100644
--- a/include/wx/xrc/xmlres.h
+++ b/include/wx/xrc/xmlres.h
@@ -261,8 +261,16 @@ public:
     // Compares resources version to argument. Returns -1 if resources version
     // is less than the argument, +1 if greater and 0 if they equal.
     int CompareVersion(int major, int minor, int release, int revision) const
-        { return GetVersion() -
-                 (major*256*256*256 + minor*256*256 + release*256 + revision); }
+    {
+        long diff = GetVersion() -
+                    (major*256*256*256 + minor*256*256 + release*256 + revision);
+        if ( diff < 0 )
+            return -1;
+        else if ( diff > 0 )
+            return +1;
+        else
+            return 0;
+    }
 
     //// Singleton accessors.