diff --git a/src/diag.cpp b/src/diag.cpp
index 734b5ab..507eae0 100644
--- a/src/diag.cpp
+++ b/src/diag.cpp
@@ -89,18 +89,8 @@ int cmdDiagnostics ()
             << "\n";
 
   // Compiler compliance level.
-  std::string compliance = "non-compliant";
-#ifdef __cplusplus
-  int level = __cplusplus;
-  if (level == 199711)
-    compliance = "C++98/03";
-  else if (level == 201103)
-    compliance = "C++11";
-  else
-    compliance = format (level);
-#endif
   std::cout << " Compliance: "
-            << compliance
+            << cppCompliance ()
             << "\n\n";
 
   std::cout << bold.colorize ("Build Features")