diff --git a/src/gc.cpp b/src/gc.cpp
index 9295b9f..1a0809d 100644
--- a/src/gc.cpp
+++ b/src/gc.cpp
@@ -16,6 +16,7 @@
 #include <fstream>
 #include "zlib.h"
 #include "gc.h"
+#include <cstdint>
 // #include<stdio.h>
 
 using namespace ::std;
diff --git a/src/gc.h b/src/gc.h
index 8a6e556..f913204 100644
--- a/src/gc.h
+++ b/src/gc.h
@@ -9,6 +9,7 @@
 #include <set>
 #include <map>
 #include <math.h>
+#include <cstdint>
 using namespace ::std;
 class quartile_result
 {
diff --git a/src/global_variable.cpp b/src/global_variable.cpp
index 812c459..362e14e 100644
--- a/src/global_variable.cpp
+++ b/src/global_variable.cpp
@@ -1,4 +1,5 @@
 #include "global_variable.h"
+#include <cstdint>
 
 C_general_stat::C_general_stat()
 {
@@ -99,4 +100,4 @@ C_global_variable::C_global_variable(C_global_parameter &gp)
 	trim2_stat = C_fastq_file_stat(gp);
 	clean1_stat = C_fastq_file_stat(gp);
 	clean2_stat = C_fastq_file_stat(gp);
-}
\ No newline at end of file
+}
diff --git a/src/global_variable.h b/src/global_variable.h
index 32b5787..85965f5 100644
--- a/src/global_variable.h
+++ b/src/global_variable.h
@@ -4,6 +4,7 @@
 #include <string>
 #include <set>
 #include "global_parameter.h"
+#include <cstdint>
 // #include <map>
 using namespace ::std;
 #define READ_MAX_LEN 1000