diff --git a/src/util/bip32.h b/src/util/bip32.h
index 8f86f2aaa64..b1d53616a4f 100644
--- a/src/util/bip32.h
+++ b/src/util/bip32.h
@@ -6,6 +6,7 @@
 #define BITCOIN_UTIL_BIP32_H
 
 #include <attributes.h>
+#include <cstdint>
 #include <string>
 #include <vector>
 
diff --git a/src/util/string.h b/src/util/string.h
index b26facc5028..ca53c7ce43f 100644
--- a/src/util/string.h
+++ b/src/util/string.h
@@ -9,6 +9,7 @@
 
 #include <algorithm>
 #include <array>
+#include <cstdint>
 #include <cstring>
 #include <locale>
 #include <sstream>