diff --git a/libavutil/lzo.c b/libavutil/lzo.c
index 221a66b9ab..82dba94771 100644
--- a/libavutil/lzo.c
+++ b/libavutil/lzo.c
@@ -65,8 +65,13 @@ static inline int get_len(LZOContext *c, int x, int mask)
 {
     int cnt = x & mask;
     if (!cnt) {
-        while (!(x = get_byte(c)))
+        while (!(x = get_byte(c))) {
+            if (cnt >= INT_MAX - 1000) {
+                c->error |= AV_LZO_ERROR;
+                break;
+            }
             cnt += 255;
+        }
         cnt += mask + x;
     }
     return cnt;