diff --git a/adafruit_rockblock.py b/adafruit_rockblock.py
index c2ab5c9..e1c569a 100644
--- a/adafruit_rockblock.py
+++ b/adafruit_rockblock.py
@@ -295,7 +295,7 @@ def ring_indication(self) -> Tuple[Optional[str], ...]:
         Returns a tuple:
         (string, string)
         """
-        resp = self._uart_xfer("+CRIS")
+        resp = self._uart_xfer("+CRISX")
         if resp[-1].strip().decode() == "OK":
             return tuple(resp[1].strip().decode().split(":")[1].split(","))
         return (None,) * 2