diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c
index 1977f1ab12..29fd01abaa 100644
--- a/tools/target_dec_fuzzer.c
+++ b/tools/target_dec_fuzzer.c
@@ -185,6 +185,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     case AV_CODEC_ID_SMACKVIDEO:  maxpixels  /= 64;    break;
     case AV_CODEC_ID_SNOW:        maxpixels  /= 128;   break;
     case AV_CODEC_ID_TGV:         maxpixels  /= 32;    break;
+    case AV_CODEC_ID_THEORA:      maxpixels  /= 1024;  break;
     case AV_CODEC_ID_TRUEMOTION2: maxpixels  /= 1024;  break;
     case AV_CODEC_ID_VC1IMAGE:    maxpixels  /= 8192;  break;
     case AV_CODEC_ID_VMNC:        maxpixels  /= 8192;  break;