diff --git a/src/core/qgsproviderregistry.cpp b/src/core/qgsproviderregistry.cpp
index 979420501490..831229860252 100644
--- a/src/core/qgsproviderregistry.cpp
+++ b/src/core/qgsproviderregistry.cpp
@@ -209,7 +209,8 @@ QgsProviderRegistry::QgsProviderRegistry( QString pluginPath )
       }
       else
       {
-        myMessage += "...invalid (lib not loadable)";
+        myMessage += "...invalid (lib not loadable): ";
+        myMessage += myLib->errorString ();
       }
 
       QgsDebugMsg( myMessage );