diff --git a/contrib/rtcwake b/contrib/rtcwake
index 42637e6f..0169fb61 100644
--- a/contrib/rtcwake
+++ b/contrib/rtcwake
@@ -17,7 +17,7 @@ _rtcwake()
             return 0
             ;;
         --device|-d)
-            COMPREPLY=( $( command ls -d /dev/rtc* 2>/dev/null ) )
+            COMPREPLY=( $( command ls -d /dev/rtc?* 2>/dev/null ) )
             COMPREPLY=( $( compgen -W '${COMPREPLY[@]#/dev/}' -- "$cur" ) )
             return 0
             ;;