diff --git a/tcctok.h b/tcctok.h
index 6e7ca1f..f754af5 100644
--- a/tcctok.h
+++ b/tcctok.h
@@ -240,7 +240,7 @@
      DEF(TOK_strlen, "strlen")
      DEF(TOK_strcpy, "strcpy")
 #endif
-#if defined __i386__ || defined __x86_64__
+#if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
      DEF(TOK_alloca, "alloca")
 #endif