diff --git a/lib/utils.sh b/lib/utils.sh
index 6646e26..fc76fa3 100644
--- a/lib/utils.sh
+++ b/lib/utils.sh
@@ -21,7 +21,7 @@ export -f stdtime
 # ------------------------------------------------------------------------------
 # Check if a function exists, return 0 if so
 function_exists() {
-    declare -f -F $1 2>&1 /dev/null
+    LC_ALL=C type -t $1 | grep function
     return $?
 }
 export -f function_exists