diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index 5836d1828ad7c188a91949e62fc9fdb5094551fa..a13a8c6a69cb1dfa9b69cc7df04b4bedcd96b434 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -489,6 +489,7 @@ BPF_CALL_4(bpf_strtol, const char *, buf, size_t, buf_len, u64, flags,
 	long long _res;
 	int err;
 
+	*res = 0;
 	err = __bpf_strtoll(buf, buf_len, flags, &_res);
 	if (err < 0)
 		return err;
@@ -515,6 +516,7 @@ BPF_CALL_4(bpf_strtoul, const char *, buf, size_t, buf_len, u64, flags,
 	bool is_negative;
 	int err;
 
+	*res = 0;
 	err = __bpf_strtoull(buf, buf_len, flags, &_res, &is_negative);
 	if (err < 0)
 		return err;