diff --git a/src/include/c.h b/src/include/c.h
index 2aab74d8b0e..b4a37661795 100644
--- a/src/include/c.h
+++ b/src/include/c.h
@@ -447,7 +447,7 @@ extern "C++"
 #ifdef pg_cxx_typeof
 #define typeof(x) pg_cxx_typeof(x)
 #elif !defined(HAVE_CXX_TYPEOF)
-#define typeof(x) std::remove_reference_t<decltype(x)>
+#define typeof(x) std::remove_reference<decltype(x)>::value
 #endif
 #ifndef HAVE_TYPEOF
 #define HAVE_TYPEOF 1