diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c
index e27c45ddaa..5b21d6715f 100644
--- a/tools/target_dec_fuzzer.c
+++ b/tools/target_dec_fuzzer.c
@@ -166,6 +166,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     case AV_CODEC_ID_FLAC:        maxsamples /= 1024;  break;
     case AV_CODEC_ID_FLV1:        maxpixels  /= 1024;  break;
     case AV_CODEC_ID_G2M:         maxpixels  /= 1024;  break;
+    case AV_CODEC_ID_GEM:         maxpixels  /= 512;   break;
     case AV_CODEC_ID_GDV:         maxpixels  /= 512;   break;
     case AV_CODEC_ID_GIF:         maxpixels  /= 16;    break;
     case AV_CODEC_ID_H264:        maxpixels  /= 256;   break;