diff --git a/src/script/interpreter.h b/src/script/interpreter.h
index 8ba0018c23ca54..b78a4551699d90 100644
--- a/src/script/interpreter.h
+++ b/src/script/interpreter.h
@@ -351,4 +351,6 @@ size_t CountWitnessSigOps(const CScript& scriptSig, const CScript& scriptPubKey,
 
 int FindAndDelete(CScript& script, const CScript& b);
 
+bool CastToBool(const std::vector<unsigned char>& vch);
+
 #endif // BITCOIN_SCRIPT_INTERPRETER_H
diff --git a/src/test/fuzz/script_interpreter.cpp b/src/test/fuzz/script_interpreter.cpp
index 5e76443abe0729..1e8aa6be075d7e 100644
--- a/src/test/fuzz/script_interpreter.cpp
+++ b/src/test/fuzz/script_interpreter.cpp
@@ -13,8 +13,6 @@
 #include <string>
 #include <vector>
 
-bool CastToBool(const std::vector<unsigned char>& vch);
-
 FUZZ_TARGET(script_interpreter)
 {
     FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());