diff --git a/src/aws/flb_aws_util.c b/src/aws/flb_aws_util.c
index 3ca93bd9a8f..01a84187a79 100644
--- a/src/aws/flb_aws_util.c
+++ b/src/aws/flb_aws_util.c
@@ -745,6 +745,7 @@ flb_sds_t flb_get_s3_key(const char *format, time_t time, const char *tag,
     flb_sds_t tmp_key = NULL;
     flb_sds_t tmp_tag = NULL;
     struct tm gmt = {0};
+    time_t gmt_tm;
 
     if (strlen(format) > S3_KEY_SIZE){
         flb_warn("[s3_key] Object key length is longer than the 1024 character limit.");
@@ -888,7 +889,8 @@ flb_sds_t flb_get_s3_key(const char *format, time_t time, const char *tag,
     tmp_key = NULL;
     flb_free(random_alphanumeric);
 
-    if (!gmtime_r(&time, &gmt)) {
+    gmt_tm = gmtime_r(&time, &gmt);
+    if (!gmt_tm) {
         flb_error("[s3_key] Failed to create timestamp.");
         goto error;
     }