diff --git a/src/libbpf_probes.c b/src/libbpf_probes.c
index 0b53987..6d49565 100644
--- a/src/libbpf_probes.c
+++ b/src/libbpf_probes.c
@@ -193,7 +193,7 @@ static int probe_map_create(enum bpf_map_type map_type)
 	LIBBPF_OPTS(bpf_map_create_opts, opts);
 	int key_size, value_size, max_entries;
 	__u32 btf_key_type_id = 0, btf_value_type_id = 0;
-	int fd = -1, btf_fd = -1, fd_inner = -1, exp_err = 0, err;
+	int fd = -1, btf_fd = -1, fd_inner = -1, exp_err = 0, err = 0;
 
 	key_size	= sizeof(__u32);
 	value_size	= sizeof(__u32);