diff --git a/arangod/Indexes/skiplist-helper.h b/arangod/Indexes/skiplist-helper.h
index 07c5453eaf..4d4e65c302 100644
--- a/arangod/Indexes/skiplist-helper.h
+++ b/arangod/Indexes/skiplist-helper.h
@@ -123,8 +123,6 @@ void SkiplistIndex_destroy (SkiplistIndex*);
 
 void SkiplistIndex_free (SkiplistIndex*);
 
-int SkiplistIndex_assignMethod (void*, TRI_index_method_assignment_type_e);
-
 //------------------------------------------------------------------------------
 //------------------------------------------------------------------------------
 // Skiplist indices, both unique and non-unique