1 files changed, 2 insertions, 1 deletions

diff --git a/meta/classes/logging.bbclass b/meta/classes/logging.bbclass
index 78d65bda3a..f6648b2119 100644
--- a/meta/classes/logging.bbclass
+++ b/meta/classes/logging.bbclass
@@ -62,7 +62,8 @@ bbdebug() {
         
         # Strip off the debug level and ensure it is an integer
         DBGLVL=$1; shift
-        if ! [[ "$DBGLVL" =~ ^[0-9]+ ]]; then
+        NONDIGITS=$(echo "$DBGLVL" | tr -d [:digit:])
+        if [ "$NONDIGITS" ]; then
                 bbfatal "$USAGE"
         fi