diff --git a/vars/addVersionFromNexusRepo.groovy b/vars/addVersionFromNexusRepo.groovy
index 34dbe9c..6df345b 100644
--- a/vars/addVersionFromNexusRepo.groovy
+++ b/vars/addVersionFromNexusRepo.groovy
@@ -21,7 +21,7 @@ enum BuildNumFlags {
 }
 
 Map call(Map config = [:]) {
-    Map defaults = [
+    def defaults = [
         nexusBase: 'https://repo.thejimnicholson.com',
         searchAPI: 'service/rest/v1/search',
         build_flag: BuildNumFlags.IS_FROM_QUERY,