diff --git a/absl/base/options.h b/absl/base/options.h
--- a/absl/base/options.h
+++ b/absl/base/options.h
@@ -99,6 +99,6 @@
 // the source location type is an alias of std::source_location type, use the
 // feature macro ABSL_USES_STD_SOURCE_LOCATION.
 //
-#define ABSL_OPTION_USE_STD_SOURCE_LOCATION 2
+#define ABSL_OPTION_USE_STD_SOURCE_LOCATION 0
 
 // ABSL_OPTION_USE_STD_ORDERING
diff --git a/absl/base/config.h b/absl/base/config.h
--- a/absl/base/config.h
+++ b/absl/base/config.h
@@ -543,5 +543,7 @@
 #ifdef __has_include
 #if __has_include(<source_location>)
-#define ABSL_HAVE_STD_SOURCE_LOCATION 1
+#if !defined(__clang__) || ABSL_HAVE_BUILTIN(__builtin_source_location)
+#define ABSL_HAVE_STD_SOURCE_LOCATION 1
+#endif
 #endif
 #else