diff --git a/src/osg/Geometry.cpp b/src/osg/Geometry.cpp
index d198b935d..0a33856e6 100644
--- a/src/osg/Geometry.cpp
+++ b/src/osg/Geometry.cpp
@@ -482,7 +482,7 @@ void Geometry::drawImplementation(State& state) const
     // Set up secondary color if required.
     //
     AttributeBinding secondaryColorBinding = _secondaryColorBinding;
-    if (secondaryColorBinding!=BIND_OFF && (!s_glSecondaryColor3ubv || s_glSecondaryColor3fv))
+    if (secondaryColorBinding!=BIND_OFF && (!s_glSecondaryColor3ubv || !s_glSecondaryColor3fv))
     {
         // switch off if not supported or have a valid data.
         secondaryColorBinding = BIND_OFF;