diff --git a/src/osg/State.cpp b/src/osg/State.cpp
index a87e96221..0cb9958a5 100644
--- a/src/osg/State.cpp
+++ b/src/osg/State.cpp
@@ -827,11 +827,11 @@ bool State::checkGLErrors(const char* str) const
     if (errorNo!=GL_NO_ERROR)
     {
         const char* error = (char*)gluErrorString(errorNo);
-        if (error) osg::notify(WARN)<<"Warning: detected OpenGL error '" << error;
-        else       osg::notify(WARN)<<"Warning: detected OpenGL error '" << errorNo;
+        if (error) osg::notify(WARN)<<"Warning: detected OpenGL error '" << error<<"'";
+        else       osg::notify(WARN)<<"Warning: detected OpenGL error number 0x" << std::hex << errorNo;
 
-        if (str) osg::notify(WARN)<<"' at "<<str<< std::endl;
-        else     osg::notify(WARN)<<"' in osg::State."<< std::endl;
+        if (str) osg::notify(WARN)<<" at "<<str<< std::endl;
+        else     osg::notify(WARN)<<" in osg::State."<< std::endl;
 
         return true;
     }
@@ -845,7 +845,7 @@ bool State::checkGLErrors(StateAttribute::GLMode mode) const
     {
         const char* error = (char*)gluErrorString(errorNo);
         if (error) osg::notify(WARN)<<"Warning: detected OpenGL error '"<< error <<"' after applying GLMode 0x"<<hex<<mode<<dec<< std::endl;
-        else       osg::notify(WARN)<<"Warning: detected OpenGL error '"<< errorNo <<"' after applying GLMode 0x"<<hex<<mode<<dec<< std::endl;
+        else       osg::notify(WARN)<<"Warning: detected OpenGL error number 0x"<< std::hex << errorNo <<" after applying GLMode 0x"<<hex<<mode<<dec<< std::endl;
 
         return true;
     }
@@ -859,7 +859,7 @@ bool State::checkGLErrors(const StateAttribute* attribute) const
     {
         const char* error = (char*)gluErrorString(errorNo);
         if (error) osg::notify(WARN)<<"Warning: detected OpenGL error '"<< error <<"' after applying attribute "<<attribute->className()<<" "<<attribute<< std::endl;
-        else       osg::notify(WARN)<<"Warning: detected OpenGL error '"<< errorNo <<"' after applying attribute "<<attribute->className()<<" "<<attribute<< std::endl;
+        else       osg::notify(WARN)<<"Warning: detected OpenGL error number 0x"<< std::hex << errorNo <<" after applying attribute "<<attribute->className()<<" "<<attribute<< std::endl;
 
         return true;
     }