1 files changed, 1 insertions, 1 deletions

diff --git a/meta/classes/logging.bbclass b/meta/classes/logging.bbclass
index 06c7c31c3e..a0c94e98c7 100644
--- a/meta/classes/logging.bbclass
+++ b/meta/classes/logging.bbclass
@@ -86,7 +86,7 @@ bbdebug() {
         
         # Strip off the debug level and ensure it is an integer
         DBGLVL=$1; shift
-        NONDIGITS=$(echo "$DBGLVL" | tr -d [:digit:])
+        NONDIGITS=$(echo "$DBGLVL" | tr -d "[:digit:]")
         if [ "$NONDIGITS" ]; then
                 bbfatal "$USAGE"
         fi