diff --git a/src/bitcoin-tx.cpp b/src/bitcoin-tx.cpp
index d49dc72abf..010cac5920 100644
--- a/src/bitcoin-tx.cpp
+++ b/src/bitcoin-tx.cpp
@@ -27,9 +27,9 @@
 #include <util/system.h>
 #include <util/translation.h>
 
+#include <cstdio>
 #include <functional>
 #include <memory>
-#include <stdio.h>
 
 static bool fCreateBlank;
 static std::map<std::string,UniValue> registers;
diff --git a/src/httpserver.cpp b/src/httpserver.cpp
index e68436cc2c..19caefe400 100644
--- a/src/httpserver.cpp
+++ b/src/httpserver.cpp
@@ -21,10 +21,10 @@
 #include <util/threadnames.h>
 #include <util/translation.h>
 
+#include <cstdio>
 #include <deque>
 #include <memory>
 #include <optional>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string>
 
diff --git a/src/ipc/interfaces.cpp b/src/ipc/interfaces.cpp
index 580590fde9..f4115db982 100644
--- a/src/ipc/interfaces.cpp
+++ b/src/ipc/interfaces.cpp
@@ -12,10 +12,10 @@
 #include <tinyformat.h>
 #include <util/system.h>
 
+#include <cstdio>
 #include <functional>
 #include <memory>
 #include <stdexcept>
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <string>
diff --git a/src/qt/utilitydialog.cpp b/src/qt/utilitydialog.cpp
index 4894cac905..331487b51d 100644
--- a/src/qt/utilitydialog.cpp
+++ b/src/qt/utilitydialog.cpp
@@ -17,7 +17,7 @@
 #include <util/system.h>
 #include <util/strencodings.h>
 
-#include <stdio.h>
+#include <cstdio>
 
 #include <QCloseEvent>
 #include <QLabel>
diff --git a/src/streams.h b/src/streams.h
index f14d347380..24778ab331 100644
--- a/src/streams.h
+++ b/src/streams.h
@@ -13,11 +13,11 @@
 
 #include <algorithm>
 #include <assert.h>
+#include <cstdio>
 #include <ios>
 #include <limits>
 #include <optional>
 #include <stdint.h>
-#include <stdio.h>
 #include <string.h>
 #include <string>
 #include <utility>