diff --git a/oss_c_sdk/oss_util.c b/oss_c_sdk/oss_util.c
index 3040e96e..c4674082 100644
--- a/oss_c_sdk/oss_util.c
+++ b/oss_c_sdk/oss_util.c
@@ -148,6 +148,10 @@ static void generate_rtmp_proto(const oss_request_options_t *options,
 
 int is_valid_ip(const char *str)
 {
+    if (!str) {
+        return 0;
+    }
+
     if (INADDR_NONE == inet_addr(str) || INADDR_ANY == inet_addr(str)) {
         return 0;
     }
diff --git a/oss_c_sdk_test/test_aos.c b/oss_c_sdk_test/test_aos.c
index 9d91e88f..0b23b5b0 100644
--- a/oss_c_sdk_test/test_aos.c
+++ b/oss_c_sdk_test/test_aos.c
@@ -79,6 +79,12 @@ void test_is_valid_ip(CuTest *tc) {
     ret = is_valid_ip("0.0.0.0");
     CuAssertIntEquals(tc, 0, ret);
 
+    ret = is_valid_ip(NULL);
+    CuAssertIntEquals(tc, 0, ret);
+
+    ret = is_valid_ip("");
+    CuAssertIntEquals(tc, 0, ret);
+
     printf("test_is_valid_ip ok\n");
 }