diff --git a/include/gsl/gsl_narrow b/include/gsl/gsl_narrow
index 295c913..7027b58 100644
--- a/include/gsl/gsl_narrow
+++ b/include/gsl/gsl_narrow
@@ -45,4 +45,4 @@ T narrow(U u) noexcept(false)
     return t;
 }
 }
-#endif // GSL_NARROW_H
\ No newline at end of file
+#endif // GSL_NARROW_H