diff --git a/include/fmt/format.h b/include/fmt/format.h
index 986d6913..efec5d6d 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -460,7 +460,7 @@ OutputIt copy_str(InputIt begin, InputIt end, OutputIt it) {
 }
 
 #ifndef FMT_USE_GRISU
-#  define FMT_USE_GRISU 1
+#  define FMT_USE_GRISU 0
 #endif
 
 template <typename T> constexpr bool use_grisu() {