diff --git a/sys/kern/sys_process.c b/sys/kern/sys_process.c
index 4014c5fc6645..2f59cb5e78bd 100644
--- a/sys/kern/sys_process.c
+++ b/sys/kern/sys_process.c
@@ -1039,8 +1039,8 @@ kern_ptrace(struct thread *td, int req, pid_t pid, void *addr, int data)
 
 		switch (req) {
 		case PT_STEP:
-			CTR2(KTR_PTRACE, "PT_STEP: tid %d (pid %d)",
-			    td2->td_tid, p->p_pid);
+			CTR3(KTR_PTRACE, "PT_STEP: tid %d (pid %d), sig = %d",
+			    td2->td_tid, p->p_pid, data);
 			error = ptrace_single_step(td2);
 			if (error)
 				goto out;