diff --git a/lib_util/cmdl_tools.c b/lib_util/cmdl_tools.c
index 010685f239921508521dbedd602c9395b18d7c64..d0d2d0d374eec0328fa6aeb56df3024f28880921 100644
--- a/lib_util/cmdl_tools.c
+++ b/lib_util/cmdl_tools.c
@@ -93,7 +93,7 @@ bool is_number( char *str )
     i = 0;
     while ( str[i] != 0 )
     {
-        if ( ( str[i] < '0' || str[i] > '9' ) && str[i] != '.' && str[i] != '-' && str[i] != '\n' )
+        if ( ( str[i] < '0' || str[i] > '9' ) && str[i] != '.' && str[i] != '-' && str[i] != '\n' && str[i] != '\r' )
         {
             return false;
         }