diff --git a/arch/loongarch/net/bpf_jit.c b/arch/loongarch/net/bpf_jit.c
index 869003f1c703..c6400d7b95ee 100644
--- a/arch/loongarch/net/bpf_jit.c
+++ b/arch/loongarch/net/bpf_jit.c
@@ -226,6 +226,8 @@ static int emit_bpf_tail_call(struct jit_ctx *ctx, int insn)
 	 *	 goto out;
 	 */
 	tc_ninsn = insn ? ctx->offset[insn+1] - ctx->offset[insn] : ctx->offset[0];
+	emit_zext_32(ctx, a2, true);
+
 	off = offsetof(struct bpf_array, map.max_entries);
 	emit_insn(ctx, ldwu, t1, a1, off);
 	/* bgeu $a2, $t1, jmp_offset */