diff --git a/data_structures/skip_list.cpp b/data_structures/skip_list.cpp
index 39dda5ce6..cc679a31c 100644
--- a/data_structures/skip_list.cpp
+++ b/data_structures/skip_list.cpp
@@ -216,4 +216,6 @@ int main() {
     }
 
     lst.displayList();
+    
+    return 0;
 }