diff --git a/sorting/radix_sort2.cpp b/sorting/radix_sort2.cpp
index dc85f487e..4c9d314ae 100644
--- a/sorting/radix_sort2.cpp
+++ b/sorting/radix_sort2.cpp
@@ -111,7 +111,7 @@ namespace sort
  * Function to test the above algorithm
  * @returns none
  */
-    void test1(){
+    static void test1(){
         std::vector<int> ar = {432,234,143,332,123};
         sort::radix_sort::radix obj(ar);
         obj.radix_sort();
@@ -146,4 +146,4 @@ int main()
     obj.radix_sort();
     obj.show();
     return 0;
-}
\ No newline at end of file
+}