diff --git a/Modules/stdwinmodule.c b/Modules/stdwinmodule.c
index 896207c..5ca798f 100644
--- a/Modules/stdwinmodule.c
+++ b/Modules/stdwinmodule.c
@@ -104,6 +104,8 @@
 
 static object *StdwinError; /* Exception stdwin.error */
 
+int StdwinIsActive;			/* True as soon as stdwin imported */
+
 /* Window and menu object types declared here because of forward references */
 
 typedef struct {
@@ -2631,6 +2633,7 @@
 		}
 #endif
 		inited = 1;
+		StdwinIsActive = 1;
 	}
 	m = initmodule("stdwin", stdwin_methods);
 	d = getmoduledict(m);