diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c
index 165951dc9d..c3f88ef49f 100644
--- a/tools/target_dec_fuzzer.c
+++ b/tools/target_dec_fuzzer.c
@@ -271,7 +271,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     case AV_CODEC_ID_QTRLE:       maxpixels  /= 16;    break;
     case AV_CODEC_ID_PAF_VIDEO:   maxpixels  /= 16;    break;
     case AV_CODEC_ID_PRORES:      maxpixels  /= 256;   break;
-    case AV_CODEC_ID_RKA:         maxsamples /= 256;   break;
+    case AV_CODEC_ID_RKA:         maxsamples /= 65536; break;
     case AV_CODEC_ID_RSCC:        maxpixels  /= 256;   break;
     case AV_CODEC_ID_RASC:        maxpixels  /= 16;    break;
     case AV_CODEC_ID_SANM:        maxpixels  /= 16;    break;