diff --git a/engine/src/blender/com/jme3/scene/plugins/blender/constraints/definitions/ConstraintDefinition.java b/engine/src/blender/com/jme3/scene/plugins/blender/constraints/definitions/ConstraintDefinition.java
index a57bea7ec..7c51c8204 100644
--- a/engine/src/blender/com/jme3/scene/plugins/blender/constraints/definitions/ConstraintDefinition.java
+++ b/engine/src/blender/com/jme3/scene/plugins/blender/constraints/definitions/ConstraintDefinition.java
@@ -48,7 +48,7 @@ public abstract class ConstraintDefinition {
             }
         }
         this.blenderContext = blenderContext;
-        constraintHelper = blenderContext.getHelper(ConstraintHelper.class);
+        constraintHelper = (ConstraintHelper) (blenderContext == null ? null : blenderContext.getHelper(ConstraintHelper.class));
         this.ownerOMA = ownerOMA;
     }