diff --git a/libavutil/lzo.c b/libavutil/lzo.c
index 8cb8da43a3..58878bce16 100644
--- a/libavutil/lzo.c
+++ b/libavutil/lzo.c
@@ -62,7 +62,13 @@ static inline int get_byte(LZOContext *c) {
 static inline int get_len(LZOContext *c, int x, int mask) {
     int cnt = x & mask;
     if (!cnt) {
-        while (!(x = get_byte(c))) cnt += 255;
+        while (!(x = get_byte(c))) {
+            if (cnt >= INT_MAX - 1000) {
+                c->error |= AV_LZO_ERROR;
+                break;
+            }
+            cnt += 255;
+        }
         cnt += mask + x;
     }
     return cnt;