diff --git a/libavformat/mov.c b/libavformat/mov.c
index f81b1092f2..bb1858886c 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -816,8 +816,8 @@ static void mov_metadata_creation_time(AVDictionary **metadata, int64_t time)
         timet = time;
         ptm = gmtime(&timet);
         if (!ptm) return;
-        strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm);
-        av_dict_set(metadata, "creation_time", buffer, 0);
+        if (strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", ptm))
+            av_dict_set(metadata, "creation_time", buffer, 0);
     }
 }
 
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 9d7f2fffcd..b01dd0c5b7 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -1877,7 +1877,8 @@ static int mxf_timestamp_to_str(uint64_t timestamp, char **str)
     *str = av_mallocz(32);
     if (!*str)
         return AVERROR(ENOMEM);
-    strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time);
+    if (!strftime(*str, 32, "%Y-%m-%d %H:%M:%S", &time))
+        str[0] = '\0';
 
     return 0;
 }
diff --git a/libavformat/wtvdec.c b/libavformat/wtvdec.c
index 5012890ef3..de3c93158c 100644
--- a/libavformat/wtvdec.c
+++ b/libavformat/wtvdec.c
@@ -389,7 +389,8 @@ static int filetime_to_iso8601(char *buf, int buf_size, int64_t value)
     struct tm *tm = gmtime(&t);
     if (!tm)
         return -1;
-    strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm);
+    if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
+        return -1;
     return 0;
 }
 
@@ -403,7 +404,8 @@ static int crazytime_to_iso8601(char *buf, int buf_size, int64_t value)
     struct tm *tm = gmtime(&t);
     if (!tm)
         return -1;
-    strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm);
+    if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
+        return -1;
     return 0;
 }
 
@@ -417,7 +419,8 @@ static int oledate_to_iso8601(char *buf, int buf_size, int64_t value)
     struct tm *tm= gmtime(&t);
     if (!tm)
         return -1;
-    strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm);
+    if (!strftime(buf, buf_size, "%Y-%m-%d %H:%M:%S", tm))
+        return -1;
     return 0;
 }