diff --git a/firmware/basic/keyin.c b/firmware/basic/keyin.c
index b0d6964..5083e80 100644
--- a/firmware/basic/keyin.c
+++ b/firmware/basic/keyin.c
@@ -19,10 +19,13 @@ uint8_t getInput(void) {
         result += BTN_ENTER;
     }
 
-    if (gpioGetValue(RB_BTN0)==0) {
-        while(gpioGetValue(RB_BTN0)==0);
-        result += BTN_LEFT;
-    }
+    if(IOCON_PIO0_1 & 1 == 1){
+        ; // disable left
+    }else
+        if (gpioGetValue(RB_BTN0)==0) {
+            while(gpioGetValue(RB_BTN0)==0);
+            result += BTN_LEFT;
+        }
 
     if (gpioGetValue(RB_BTN1)==0) {
         while(gpioGetValue(RB_BTN1)==0);