diff --git a/src/utils/os_internal.c b/src/utils/os_internal.c
index 925aff5f2..8024a3074 100644
--- a/src/utils/os_internal.c
+++ b/src/utils/os_internal.c
@@ -73,8 +73,9 @@ int os_mktime(int year, int month, int day, int hour, int min, int sec,
 int os_gmtime(os_time_t t, struct os_tm *tm)
 {
 	struct tm *tm2;
+	time_t t2 = t;
 
-	tm2 = gmtime(&t);
+	tm2 = gmtime(&t2);
 	if (tm2 == NULL)
 		return -1;
 	tm->sec = tm2->tm_sec;
diff --git a/src/utils/os_unix.c b/src/utils/os_unix.c
index cadcb8d58..9b16b3384 100644
--- a/src/utils/os_unix.c
+++ b/src/utils/os_unix.c
@@ -109,8 +109,9 @@ int os_mktime(int year, int month, int day, int hour, int min, int sec,
 int os_gmtime(os_time_t t, struct os_tm *tm)
 {
 	struct tm *tm2;
+	time_t t2 = t;
 
-	tm2 = gmtime(&t);
+	tm2 = gmtime(&t2);
 	if (tm2 == NULL)
 		return -1;
 	tm->sec = tm2->tm_sec;
diff --git a/src/utils/os_win32.c b/src/utils/os_win32.c
index c93be301e..51bd5456b 100644
--- a/src/utils/os_win32.c
+++ b/src/utils/os_win32.c
@@ -96,8 +96,9 @@ int os_mktime(int year, int month, int day, int hour, int min, int sec,
 int os_gmtime(os_time_t t, struct os_tm *tm)
 {
 	struct tm *tm2;
+	time_t t2 = t;
 
-	tm2 = gmtime(&t);
+	tm2 = gmtime(&t2);
 	if (tm2 == NULL)
 		return -1;
 	tm->sec = tm2->tm_sec;