diff --git a/sys/alpha/alpha/trap.c b/sys/alpha/alpha/trap.c
index b86c6ed15728..459146d740ed 100644
--- a/sys/alpha/alpha/trap.c
+++ b/sys/alpha/alpha/trap.c
@@ -700,7 +700,7 @@ syscall(code, framep)
 	PROC_UNLOCK(p);
 
 #ifdef DIAGNOSTIC
-	alpha_fpstate_check(p);
+	alpha_fpstate_check(td);
 #endif
 
 	if (p->p_sysent->sv_prepsyscall) {