diff --git a/src/i_system.c b/src/i_system.c
index 38803cfd..f612ce6e 100644
--- a/src/i_system.c
+++ b/src/i_system.c
@@ -87,7 +87,7 @@ void I_ErrorMsg()
         SDL_ShowSimpleMessageBox(exit_code == 0 ?
                                  SDL_MESSAGEBOX_INFORMATION :
                                  SDL_MESSAGEBOX_ERROR,
-                                 PROJECT_STRING, errmsg, NULL);
+                                 PROJECT_STRING ": Error message (this is not a \"crash\")", errmsg, NULL);
     }
 }