diff --git a/tasmota/tasmota_support/support_command.ino b/tasmota/tasmota_support/support_command.ino
index 34d6b4611..946e8c2aa 100644
--- a/tasmota/tasmota_support/support_command.ino
+++ b/tasmota/tasmota_support/support_command.ino
@@ -2156,7 +2156,7 @@ void CmndSwitchMode(void) {
         Settings->switchmode[i] = XdrvMailbox.payload;
       }
     }
-    char stemp[MAX_SWITCHES_SET * 3];
+    char stemp[MAX_SWITCHES_SET * 4];
     stemp[0] = '\0';
     for (uint32_t i = 0; i < MAX_SWITCHES_SET; i++) {
       snprintf_P(stemp, sizeof(stemp), PSTR("%s%s%d" ), stemp, (i > 0 ? "," : "["), Settings->switchmode[i]);