diff --git a/explore/include/explore/frontier_search.h b/explore/include/explore/frontier_search.h
index e0e228e..5e0febf 100644
--- a/explore/include/explore/frontier_search.h
+++ b/explore/include/explore/frontier_search.h
@@ -55,7 +55,7 @@ class FrontierSearch
    * @return new frontier
    */
   Frontier buildNewFrontier(unsigned int initial_cell, unsigned int reference,
-                            std::vector<bool>& frontier_flag);
+                            std::vector<bool>& frontier_flag, int dist);
 
   /**
    * @brief isNewFrontierCell Evaluate if candidate cell is a valid candidate