diff --git a/src/test/fuzz/base_encode_decode.cpp b/src/test/fuzz/base_encode_decode.cpp
index 2ffcbdf7207..45088187178 100644
--- a/src/test/fuzz/base_encode_decode.cpp
+++ b/src/test/fuzz/base_encode_decode.cpp
@@ -92,5 +92,6 @@ FUZZ_TARGET(psbt_base64_decode)
 
     PartiallySignedTransaction psbt;
     std::string error;
-    assert(DecodeBase64PSBT(psbt, random_string, error) == error.empty());
+    const bool ok{DecodeBase64PSBT(psbt, random_string, error)};
+    assert(ok == error.empty());
 }