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-rw-r--r--Src/Modules/curses.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Src/Modules/curses.c b/Src/Modules/curses.c
index bfcbeca01..1cc711a2d 100644
--- a/Src/Modules/curses.c
+++ b/Src/Modules/curses.c
@@ -78,7 +78,7 @@ zcurses_validate_window(char *win, int criteria)
 
     target = (unsigned)atoi(win);
 
-    if (target > ZCURSES_MAX_WINDOWS) {
+    if (target > ZCURSES_MAX_WINDOWS || target < 1) {
 	zc_errno = ZCURSES_ERANGE;
 	return -1;
     }