diff --git a/orca-clouddriver/src/main/groovy/com/netflix/spinnaker/orca/clouddriver/tasks/providers/gce/GoogleSecurityGroupUpserter.groovy b/orca-clouddriver/src/main/groovy/com/netflix/spinnaker/orca/clouddriver/tasks/providers/gce/GoogleSecurityGroupUpserter.groovy
index 137d817f59..82f38ca453 100644
--- a/orca-clouddriver/src/main/groovy/com/netflix/spinnaker/orca/clouddriver/tasks/providers/gce/GoogleSecurityGroupUpserter.groovy
+++ b/orca-clouddriver/src/main/groovy/com/netflix/spinnaker/orca/clouddriver/tasks/providers/gce/GoogleSecurityGroupUpserter.groovy
@@ -67,7 +67,7 @@ class GoogleSecurityGroupUpserter implements SecurityGroupUpserter, CloudProvide
 
       // What is currently cached?
       Set<String> existingSourceRanges = existingSecurityGroup.inboundRules.findResults { inboundRule ->
-        inboundRule.range ? inboundRule.range.ip + inboundRule.range.cidr : null
+        inboundRule.range?.ip ? inboundRule.range.ip + inboundRule.range.cidr : null
       }.unique() as Set
 
       boolean rangesMatch = existingSourceRanges == targetSecurityGroupSourceRanges