diff --git a/qtruby/rubylib/qtruby/Qt.cpp b/qtruby/rubylib/qtruby/Qt.cpp
index 715110f2..de1ee3d1 100644
--- a/qtruby/rubylib/qtruby/Qt.cpp
+++ b/qtruby/rubylib/qtruby/Qt.cpp
@@ -2640,7 +2640,7 @@ isObject(VALUE /*self*/, VALUE obj)
 {
     void * ptr = 0;
     ptr = value_to_ptr(obj);
-    return (ptr > 0 ? Qtrue : Qfalse);
+    return (ptr != 0 ? Qtrue : Qfalse);
 }
 
 static VALUE