diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c
index 9b241f5f71..f02557d001 100644
--- a/tools/target_dec_fuzzer.c
+++ b/tools/target_dec_fuzzer.c
@@ -161,6 +161,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     case AV_CODEC_ID_IFF_ILBM:    maxpixels  /= 128;   break;
     case AV_CODEC_ID_INDEO4:      maxpixels  /= 128;   break;
     case AV_CODEC_ID_LSCR:        maxpixels  /= 16;    break;
+    case AV_CODEC_ID_MMVIDEO:     maxpixels  /= 256;   break;
     case AV_CODEC_ID_MOTIONPIXELS:maxpixels  /= 256;   break;
     case AV_CODEC_ID_MP4ALS:      maxsamples /= 65536; break;
     case AV_CODEC_ID_MSRLE:       maxpixels  /= 16;    break;