diff --git a/include/fmt/format.h b/include/fmt/format.h
index 30ab89973127..6eb0619226b7 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -86,10 +86,11 @@
 #    elif FMT_MSC_VERSION >= 1929  // VS2019 v16.10 and later
 #      define FMT_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]]
 #    endif
-#  else
-#    define FMT_NO_UNIQUE_ADDRESS
 #  endif
 #endif
+#ifndef FMT_NO_UNIQUE_ADDRESS
+#  define FMT_NO_UNIQUE_ADDRESS
+#endif
 
 #if FMT_GCC_VERSION || defined(__clang__)
 #  define FMT_VISIBILITY(value) __attribute__((visibility(value)))