diff --git a/src/cpu.cpp b/src/cpu.cpp
index 8ed93c409..e0b347bfa 100644
--- a/src/cpu.cpp
+++ b/src/cpu.cpp
@@ -5,6 +5,7 @@
 
 #include "platform.h"
 
+#include <cstdint>
 #include <limits.h>
 #ifndef __wasi__
 #include <setjmp.h>
diff --git a/src/cpu.h b/src/cpu.h
index 1a13636bc..8d77b2736 100644
--- a/src/cpu.h
+++ b/src/cpu.h
@@ -5,6 +5,7 @@
 #define NCNN_CPU_H
 
 #include <stddef.h>
+#include <cstdint>
 
 #if defined _WIN32
 #define WIN32_LEAN_AND_MEAN
diff --git a/src/platform.h.in b/src/platform.h.in
index 7bb27c6b0..6ee6a497c 100644
--- a/src/platform.h.in
+++ b/src/platform.h.in
@@ -4,6 +4,8 @@
 #ifndef NCNN_PLATFORM_H
 #define NCNN_PLATFORM_H
 
+#include <cstdint>
+
 #cmakedefine01 NCNN_STDIO
 #cmakedefine01 NCNN_STRING
 #cmakedefine01 NCNN_SIMPLEOCV