diff --git a/libavformat/jacosubdec.c b/libavformat/jacosubdec.c
index e70ceeaafd..14221b166c 100644
--- a/libavformat/jacosubdec.c
+++ b/libavformat/jacosubdec.c
@@ -148,9 +148,15 @@ static int get_shift(int timeres, const char *buf)
 
     ret = 0;
     switch (n) {
-    case 4: ret = sign * (((int64_t)a*3600 + b*60 + c) * timeres + d);
-    case 3: ret = sign * ((         (int64_t)a*60 + b) * timeres + c);
-    case 2: ret = sign * ((                (int64_t)a) * timeres + b);
+    case 4:
+        ret = sign * (((int64_t)a*3600 + b*60 + c) * timeres + d);
+        break;
+    case 3:
+        ret = sign * ((         (int64_t)a*60 + b) * timeres + c);
+        break;
+    case 2:
+        ret = sign * ((                (int64_t)a) * timeres + b);
+        break;
     }
     if ((int)ret != ret)
         ret = 0;