diff --git a/vars/addVersionFromNexusRepo.groovy b/vars/addVersionFromNexusRepo.groovy
index bee17cd..f49075b 100644
--- a/vars/addVersionFromNexusRepo.groovy
+++ b/vars/addVersionFromNexusRepo.groovy
@@ -46,7 +46,7 @@ Map call(Map config = [:]) {
 
     version = latest.version
     buildNumFromQuery = '1'
-    if (version == 'null') {
+    if (version == null) {
         matches = (latest.name =~ /.*-([0-9\.]+)-([0-9]+)\.)[0]/)[0]
         version = matches[1]
         buildNumFromQuery = matches[2]