diff --git a/lib/utils.sh b/lib/utils.sh
index 5d8e038..125652a 100644
--- a/lib/utils.sh
+++ b/lib/utils.sh
@@ -15,6 +15,7 @@ function_exists() {
     declare -f -F $1 > /dev/null
     return $?
 }
+export -f function_exists
 
 
 # ------------------------------------------------------------------------------