diff --git a/src/consensus/tx_verify.h b/src/consensus/tx_verify.h
--- a/src/consensus/tx_verify.h
+++ b/src/consensus/tx_verify.h
@@ -8,7 +8,7 @@
 #include <cstdint>
 #include <vector>
 
-class Amount;
+struct Amount;
 class CBlockIndex;
 class CCoinsViewCache;
 class Config;
diff --git a/src/core_io.h b/src/core_io.h
--- a/src/core_io.h
+++ b/src/core_io.h
@@ -8,7 +8,7 @@
 #include <string>
 #include <vector>
 
-class Amount;
+struct Amount;
 class CBlock;
 class CMutableTransaction;
 class CScript;