diff --git a/config.def.h b/config.def.h
index 2369291..6392e2c 100644
--- a/config.def.h
+++ b/config.def.h
@@ -329,7 +329,7 @@ static const Rule rules[] = {
 	 *	_NET_WM_WINDOW_TYPE(ATOM) = wintype
 	 */
 	RULE(.wintype = WTYPE "DIALOG", .isfloating = 1)
-	RULE(.wintype = WTYPE "UTILITY", .fisloating = 1)
+	RULE(.wintype = WTYPE "UTILITY", .isfloating = 1)
 	RULE(.wintype = WTYPE "TOOLBAR", .isfloating = 1)
 	RULE(.wintype = WTYPE "SPLASH", .isfloating = 1)
 	RULE(.class = "Gimp", .tags = 1 << 4)