diff --git a/src/main/java/org/jenkinsci/plugins/workflow/vSphereStep.java b/src/main/java/org/jenkinsci/plugins/workflow/vSphereStep.java
index 899111ec..bf132435 100644
--- a/src/main/java/org/jenkinsci/plugins/workflow/vSphereStep.java
+++ b/src/main/java/org/jenkinsci/plugins/workflow/vSphereStep.java
@@ -122,7 +122,9 @@ protected String run() throws Exception {
                     step.getBuildStep().getClass().toString().contains("Clone") ||
                     step.getBuildStep().getClass().toString().contains("ExposeGuestInfo")) {
                 IP = step.getBuildStep().getIP();
-                envVars.put("VSPHERE_IP", IP);
+                if (IP != null) {
+                    envVars.put("VSPHERE_IP", IP);
+                }
 
                 if (step.getBuildStep().getClass().toString().contains("ExposeGuestInfo")) {
                     Map<String, String> envVars = ((ExposeGuestInfo)step.getBuildStep()).getVars();
@@ -136,4 +138,4 @@ protected String run() throws Exception {
             return IP;
         }
     }
-}
\ No newline at end of file
+}