diff --git a/libavcodec/flac_parser.c b/libavcodec/flac_parser.c
index ffa6a28457..b9d65e8a6f 100644
--- a/libavcodec/flac_parser.c
+++ b/libavcodec/flac_parser.c
@@ -55,6 +55,7 @@
 
 /** largest possible size of flac header */
 #define MAX_FRAME_HEADER_SIZE 16
+#define MAX_FRAME_VERIFY_SIZE (MAX_FRAME_HEADER_SIZE)
 
 typedef struct FLACHeaderMarker {
     int offset;       /**< byte offset from start of FLACParseContext->buffer */
@@ -169,7 +170,7 @@ static int find_headers_search_validate(FLACParseContext *fpc, int offset)
     uint8_t *header_buf;
     int size = 0;
     header_buf = flac_fifo_read_wrap(fpc, offset,
-                                     MAX_FRAME_HEADER_SIZE,
+                                     MAX_FRAME_VERIFY_SIZE + AV_INPUT_BUFFER_PADDING_SIZE,
                                      &fpc->wrap_buf,
                                      &fpc->wrap_buf_allocated_size);
     if (frame_header_is_valid(fpc->avctx, header_buf, &fi)) {