diff --git a/src/common/Utilities/Duration.h b/src/common/Utilities/Duration.h
index 2a7e83d323..1e36e8627a 100644
--- a/src/common/Utilities/Duration.h
+++ b/src/common/Utilities/Duration.h
@@ -48,8 +48,8 @@ using Years = std::chrono::years;
 /// Months shorthand typedef.
 using Months = std::chrono::months;
 
+// Fix GCC for C++20
 #if GCC_VERSION
-
 /// days
 using Days = duration<_GLIBCXX_CHRONO_INT64_T, ratio<86400>>;
 
@@ -62,6 +62,8 @@ using Years = duration<_GLIBCXX_CHRONO_INT64_T, ratio<31556952>>;
 /// months
 using Months = duration<_GLIBCXX_CHRONO_INT64_T, ratio<2629746>>;
 
+#endif // GCC_VERSION
+
 #else
 /// Days shorthand typedef. (delete after start support c++20)
 using Days = std::chrono::duration<int, std::ratio_multiply<std::ratio<24>, Hours::period>>;