diff --git a/src/addressindex.h b/src/addressindex.h
index 58c496a181..5193a92bb9 100644
--- a/src/addressindex.h
+++ b/src/addressindex.h
@@ -8,8 +8,9 @@
 #ifndef BITCOIN_ADDRESSINDEX_H
 #define BITCOIN_ADDRESSINDEX_H
 
-#include <uint256.h>
 #include <amount.h>
+#include <serialize.h>
+#include <uint256.h>
 
 #include <chrono>
 #include <tuple>
diff --git a/src/timestampindex.h b/src/timestampindex.h
index a1e300bfda..42c34ee55e 100644
--- a/src/timestampindex.h
+++ b/src/timestampindex.h
@@ -8,6 +8,7 @@
 #ifndef BITCOIN_TIMESTAMPINDEX_H
 #define BITCOIN_TIMESTAMPINDEX_H
 
+#include <serialize.h>
 #include <uint256.h>
 
 struct CTimestampIndexIteratorKey {