diff --git a/include/fmt/core.h b/include/fmt/core.h
index c2e52a6d..3fc11afb 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -171,7 +171,7 @@
 #endif
 
 #ifndef FMT_INLINE
-#  if FMT_GCC_VERSION
+#  if FMT_GCC_VERSION && FMT_USE_CONSTEXPR
 #    define FMT_INLINE inline __attribute__((always_inline))
 #  else
 #    define FMT_INLINE