diff --git a/src/include/c.h b/src/include/c.h
index ff7c2eddcec..2c2451d11e1 100644
--- a/src/include/c.h
+++ b/src/include/c.h
@@ -195,18 +195,25 @@
  * Marking certain functions as "hot" or "cold" can be useful to assist the
  * compiler in arranging the assembly code in a more efficient way.
  */
-#if defined(__has_attribute) && __has_attribute (cold)
+#if defined(__has_attribute)
+
+#if __has_attribute (cold)
 #define pg_attribute_cold __attribute__((cold))
 #else
 #define pg_attribute_cold
 #endif
 
-#if defined(__has_attribute) && __has_attribute (hot)
+#if __has_attribute (hot)
 #define pg_attribute_hot __attribute__((hot))
 #else
 #define pg_attribute_hot
 #endif
 
+#else
+#define pg_attribute_hot
+#define pg_attribute_cold
+#endif
+
 /*
  * Mark a point as unreachable in a portable fashion.  This should preferably
  * be something that the compiler understands, to aid code generation.