diff --git a/CppCoreGuidelines.md b/CppCoreGuidelines.md
index 4d9ca05..dfa89b4 100644
--- a/CppCoreGuidelines.md
+++ b/CppCoreGuidelines.md
@@ -10687,7 +10687,7 @@ Requires messy cast-and-macro-laden code to get working right.
 
     void error(int severity)
     {
-        std::cerr << std::endl;
+        std::cerr << '\n' << std::flush;
         std::exit(severity);
     }