diff --git a/tools/net/bpf_dbg.c b/tools/net/bpf_dbg.c
index bb31813e43dd..9a287bec695a 100644
--- a/tools/net/bpf_dbg.c
+++ b/tools/net/bpf_dbg.c
@@ -820,7 +820,7 @@ static void bpf_single_step(struct bpf_regs *r, struct sock_filter *f,
 		r->A &= r->X;
 		break;
 	case BPF_ALU_AND | BPF_K:
-		r->A &= r->X;
+		r->A &= K;
 		break;
 	case BPF_ALU_OR | BPF_X:
 		r->A |= r->X;