diff --git a/source/blender/editors/screen/screen_edit.c b/source/blender/editors/screen/screen_edit.c
index bf44e6be7b6..f71d63e5fef 100644
--- a/source/blender/editors/screen/screen_edit.c
+++ b/source/blender/editors/screen/screen_edit.c
@@ -1291,9 +1291,12 @@ void ED_screen_set_subwinactive(bContext *C, wmEvent *event)
 						break;
 		}
 		if (sa) {
+			/* make overlap active when mouse over */
 			for (ar = sa->regionbase.first; ar; ar = ar->next) {
-				if (BLI_rcti_isect_pt_v(&ar->winrct, &event->x))
+				if (BLI_rcti_isect_pt_v(&ar->winrct, &event->x)) {
 					scr->subwinactive = ar->swinid;
+					break;
+				}
 			}
 		}
 		else