diff --git a/ops.cc b/ops.cc
index 3276129..49a5dfa 100644
--- a/ops.cc
+++ b/ops.cc
@@ -875,6 +875,7 @@ void T_OpContext::run(
 		    }
 
 		    case OP_UI_PEXIT:
+		    	glFinish( );
 			Globals::Profiler( ).end( profiling.last( ) );
 			profiling.removeLast( );
 			break;