diff --git a/process.c b/process.c
index 690ca8e..73092a2 100644
--- a/process.c
+++ b/process.c
@@ -55,8 +55,7 @@
 	XLAT_END
 };
 
-int
-sys_ptrace(struct tcb *tcp)
+SYS_FUNC(ptrace)
 {
 	const struct xlat *x;
 	unsigned long addr;