diff --git a/src/common/variant.cpp b/src/common/variant.cpp
index 0098b9a90e..0362653cc8 100644
--- a/src/common/variant.cpp
+++ b/src/common/variant.cpp
@@ -1982,6 +1982,7 @@ wxVariantData* wxVariantDataList::VariantDataFactory(const wxAny& any)
 {
     wxAnyList src = any.As<wxAnyList>();
     wxVariantList dst;
+    dst.DeleteContents(true);
     wxAnyList::compatibility_iterator node = src.GetFirst();
     while (node)
     {