diff --git a/cdist/conf/type/__postgres_role/gencode-remote b/cdist/conf/type/__postgres_role/gencode-remote
index 14240992..f977e73e 100755
--- a/cdist/conf/type/__postgres_role/gencode-remote
+++ b/cdist/conf/type/__postgres_role/gencode-remote
@@ -34,7 +34,7 @@ case "$state_should" in
             if [ ! -f "$__object/parameter/$boolean" ]; then
                 boolean="no${boolean}"
             fi
-            upper=$(echo $boolean | tr '[a-z]' '[A-Z]')
+            upper=$(echo $boolean | tr '[:lower:]' '[:upper:]')
             booleans="$booleans $upper"
         done