diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c
index e1b5d2b3c1..28042077c6 100644
--- a/tools/target_dec_fuzzer.c
+++ b/tools/target_dec_fuzzer.c
@@ -298,6 +298,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     case AV_CODEC_ID_WMALOSSLESS: maxsamples /= 1024;  break;
     case AV_CODEC_ID_YLC:         maxpixels  /= 1024;  break;
     case AV_CODEC_ID_ZEROCODEC:   maxpixels  /= 128;   break;
+    case AV_CODEC_ID_ZLIB:        maxpixels  /= 4096;  break;
     }
 
     maxsamples_per_frame = FFMIN(maxsamples_per_frame, maxsamples);