diff --git a/base/location.h b/base/location.h
index c07e747..924db1c 100644
--- a/base/location.h
+++ b/base/location.h
@@ -18,7 +18,7 @@
namespace base {
-#if defined(__has_builtin)
+#if defined(__clang__)
// Clang allows detection of these builtins.
#define SUPPORTS_LOCATION_BUILTINS \
(__has_builtin(__builtin_FUNCTION) && __has_builtin(__builtin_FILE) && \