diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c
index 24c90cf952..47a5a51afd 100644
--- a/tools/target_dec_fuzzer.c
+++ b/tools/target_dec_fuzzer.c
@@ -245,7 +245,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     case AV_CODEC_ID_HEVC:        maxpixels  /= 16384; break;
     case AV_CODEC_ID_HNM4_VIDEO:  maxpixels  /= 128;   break;
     case AV_CODEC_ID_HQ_HQA:      maxpixels  /= 128;   break;
-    case AV_CODEC_ID_IFF_ILBM:    maxpixels  /= 128;   break;
+    case AV_CODEC_ID_IFF_ILBM:    maxpixels  /= 4096;  break;
     case AV_CODEC_ID_INDEO4:      maxpixels  /= 128;   break;
     case AV_CODEC_ID_INTERPLAY_ACM: maxsamples /= 16384;  break;
     case AV_CODEC_ID_JPEG2000:    maxpixels  /= 4096;  break;