diff --git a/examples/osgintrospection/CMakeLists.txt b/examples/osgintrospection/CMakeLists.txt
index e85ead821..1cd079104 100644
--- a/examples/osgintrospection/CMakeLists.txt
+++ b/examples/osgintrospection/CMakeLists.txt
@@ -1,5 +1,7 @@
 SET(TARGET_SRC osgintrospection.cpp )
 SET(TARGET_ADDED_LIBRARIES osgIntrospection )
 
+ADD_DEFINITIONS(-DOSG_PLUGIN_EXTENSION=${CMAKE_SHARED_MODULE_SUFFIX})
+
 #### end var setup  ###
 SETUP_EXAMPLE(osgintrospection)
diff --git a/examples/osgintrospection/osgintrospection.cpp b/examples/osgintrospection/osgintrospection.cpp
index 644cccb2e..e4cd00b6d 100644
--- a/examples/osgintrospection/osgintrospection.cpp
+++ b/examples/osgintrospection/osgintrospection.cpp
@@ -25,13 +25,13 @@
 #include <osgIntrospection/PropertyInfo>
 
 #include <osgDB/DynamicLibrary>
+#include <osg/Object>
 
 #include <iostream>
 #include <algorithm>
 
 using namespace osgIntrospection;
 
-
 // borrowed from osgDB...
 std::string createLibraryNameForWrapper(const std::string& ext)
 {
@@ -49,9 +49,9 @@ std::string createLibraryNameForWrapper(const std::string& ext)
         #endif
     #endif
 #elif macintosh
-    return "osgwrapper_"+ext;
+    return "osgwrapper_" + ext;
 #else
-    return "osgwrapper_"+ext+ ADDQUOTES(OSG_PLUGIN_EXTENSION);
+    return "osgwrapper_" + ext + ADDQUOTES(OSG_PLUGIN_EXTENSION);
 #endif
 
 }