diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c
index 2e10fbc54b..507ac429fa 100644
--- a/tools/target_dec_fuzzer.c
+++ b/tools/target_dec_fuzzer.c
@@ -170,12 +170,12 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     maxpixels = maxpixels_per_frame * maxiteration;
     switch (c->id) {
         // Allows a small input to generate gigantic output
-    case AV_CODEC_ID_QTRLE:     maxpixels /= 16;
-    case AV_CODEC_ID_GIF:       maxpixels /= 16;
+    case AV_CODEC_ID_QTRLE:     maxpixels /= 16;  break;
+    case AV_CODEC_ID_GIF:       maxpixels /= 16;  break;
         // Performs slow frame rescaling in C
-    case AV_CODEC_ID_GDV:       maxpixels /= 256;
+    case AV_CODEC_ID_GDV:       maxpixels /= 256; break;
         // Postprocessing in C
-    case AV_CODEC_ID_HNM4_VIDEO:maxpixels /= 128;
+    case AV_CODEC_ID_HNM4_VIDEO:maxpixels /= 128; break;
     }