diff --git a/Boolean_set_operations_2/test/Boolean_set_operations_2/test_bop.cpp b/Boolean_set_operations_2/test/Boolean_set_operations_2/test_bop.cpp
index 246cdd25c34..e4e420178b5 100644
--- a/Boolean_set_operations_2/test/Boolean_set_operations_2/test_bop.cpp
+++ b/Boolean_set_operations_2/test/Boolean_set_operations_2/test_bop.cpp
@@ -383,10 +383,10 @@ bool test_one_file(std::ifstream & inp)
   else
     inp >> pwh2;
 
-  if (type1 == 0 && type2 == 0) return test(inp, p1 ,p2);
-  if (type1 == 0 && type2 == 1) return test(inp, p1 ,pwh2);
-  if (type1 == 1 && type2 == 0) return test(inp, pwh1, p2);
-  if (type1 == 1 && type2 == 1) return test(inp, pwh1, pwh2);
+  if (type1 == 0 && type2 == 0) return ::test(inp, p1 ,p2);
+  if (type1 == 0 && type2 == 1) return ::test(inp, p1 ,pwh2);
+  if (type1 == 1 && type2 == 0) return ::test(inp, pwh1, p2);
+  if (type1 == 1 && type2 == 1) return ::test(inp, pwh1, pwh2);
   return false;
 }