diff --git a/src/rpc/rawtransaction_util.h b/src/rpc/rawtransaction_util.h
--- a/src/rpc/rawtransaction_util.h
+++ b/src/rpc/rawtransaction_util.h
@@ -9,7 +9,7 @@
 class CChainParams;
 
 class UniValue;
-struct CMutableTransaction;
+class CMutableTransaction;
 
 namespace interfaces {
 class Chain;