diff --git a/src/setup_payload/tests/FuzzBase38Decode.cpp b/src/setup_payload/tests/FuzzBase38Decode.cpp
index 11d29c2151c8e6..317473370230c7 100644
--- a/src/setup_payload/tests/FuzzBase38Decode.cpp
+++ b/src/setup_payload/tests/FuzzBase38Decode.cpp
@@ -16,6 +16,8 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t * data, size_t len)
     std::string base38EncodedString(reinterpret_cast<const char *>(data), len);
     std::vector<uint8_t> decodedData;
 
+    // Ignoring return value, because in general the data is garbage and won't decode properly.
+    // We're just testing that the decoder does not crash on the fuzzer-generated inputs.
     chip::base38Decode(base38EncodedString, decodedData);
 
     return 0;