diff --git a/libgo/runtime/go-varargs.c b/libgo/runtime/go-varargs.c
index f9270a9..9cb4a7e 100644
--- a/libgo/runtime/go-varargs.c
+++ b/libgo/runtime/go-varargs.c
@@ -114,7 +114,9 @@
 
 #endif
 
-#ifdef HAVE_SYS_PTRACE_H
+// AIX ptrace is really different from Linux ptrace. Let syscall
+// package handles it.
+#if defined(HAVE_SYS_PTRACE_H) && !defined(_AIX)
 
 // Despite documented appearances, this is actually implemented as
 // a variadic function within glibc.