diff --git a/src/libs/vpatterndb/variables/vcurvevariable.cpp b/src/libs/vpatterndb/variables/vcurvevariable.cpp
index db118bdea..904a56976 100644
--- a/src/libs/vpatterndb/variables/vcurvevariable.cpp
+++ b/src/libs/vpatterndb/variables/vcurvevariable.cpp
@@ -68,6 +68,11 @@ VCurveVariable::~VCurveVariable()
 //---------------------------------------------------------------------------------------------------------------------
 bool VCurveVariable::Filter(quint32 id)
 {
+    if (id == NULL_ID)
+    {
+        return false;
+    }
+
     if (d->parentId != NULL_ID)//Do not check if value zero
     {// Not all curves have parents. Only those who was created after cutting the parent curve.
         return d->id == id || d->parentId == id;