diff --git a/include/fmt/core.h b/include/fmt/core.h
index 54686e2d..0d1b5523 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -227,7 +227,7 @@
 
 // An enable_if helper to be used in template parameters. enable_if in template
 // parameters results in much shorter symbols: https://godbolt.org/z/sWw4vP.
-#define FMT_ENABLE_IF_T(...) typename std::enable_if<__VA_ARGS__, int>::type
+#define FMT_ENABLE_IF_T(...) typename std::enable_if<(__VA_ARGS__), int>::type
 #define FMT_ENABLE_IF(...) FMT_ENABLE_IF_T(__VA_ARGS__) = 0
 
 FMT_BEGIN_NAMESPACE