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-rw-r--r--libavformat/mov.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 33126781a0..cb6f3a45de 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -3256,7 +3256,7 @@ static int64_t add_ctts_entry(MOVStts** ctts_data, unsigned int* ctts_count, uns
FFMAX(min_size_needed, 2 * (*allocated_size)) :
min_size_needed;
- if((unsigned)(*ctts_count) + 1 >= UINT_MAX / sizeof(MOVStts))
+ if((unsigned)(*ctts_count) >= UINT_MAX / sizeof(MOVStts) - 1)
return -1;
ctts_buf_new = av_fast_realloc(*ctts_data, allocated_size, requested_size);