diff --git a/libc/include/stdatomic.h b/libc/include/stdatomic.h
index 2c04221..6854d8b 100644
--- a/libc/include/stdatomic.h
+++ b/libc/include/stdatomic.h
@@ -125,7 +125,7 @@
 
 #if __has_extension(c_atomic) || __has_extension(cxx_atomic)
 #define	__CLANG_ATOMICS
-#elif __GNUC_PREREQ__(4, 7)
+#elif __GNUC_PREREQ(4, 7)
 #define	__GNUC_ATOMICS
 #elif defined(__GNUC__)
 #define	__SYNC_ATOMICS