diff --git a/include/fmt/format.h b/include/fmt/format.h
index 5124e1ee..32b42dd5 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -995,7 +995,7 @@ FMT_INLINE uint16_t bsr2log10(int bsr) {
   return data[bsr];
 }
 
-FMT_EXTERN template struct FMT_INSTANTIATION_DEF_API basic_data<void>;
+FMT_EXTERN template struct FMT_INSTANTIATION_DECL_API basic_data<void>;
 
 // This is a struct rather than an alias to avoid shadowing warnings in gcc.
 struct data : basic_data<> {};