diff --git a/protobuf.c b/protobuf.c
index 061c6d3..f95122e 100644
--- a/protobuf.c
+++ b/protobuf.c
@@ -1,7 +1,7 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
 #include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
 #include "simple_protobuf.h"
 
 static uint32_t read_num(FILE* fp) {
diff --git a/simple_protobuf.h b/simple_protobuf.h
index f730b4c..4c0adc1 100644
--- a/simple_protobuf.h
+++ b/simple_protobuf.h
@@ -1,6 +1,7 @@
 #ifndef _SIMPLE_PROTOBUF_H_
 #define _SIMPLE_PROTOBUF_H_
 
+#include <stdio.h>
 #include <stdint.h>
 
 struct SIMPLE_PB {
diff --git a/test.c b/test.c
index 13eeeb0..1d5c432 100644
--- a/test.c
+++ b/test.c
@@ -33,7 +33,7 @@ int main() {
         if(fp) {
             SIMPLE_PB* spb = get_pb(fp);
             memcpy(&t, spb->target, sizeof(struct TEST));
-            printf("a:%u\nb:%u\nc:%u\nd:%llu\ne:%s\n", t.a, t.b, t.c, t.d, t.e);
+            printf("a:%u\nb:%u\nc:%u\nd:%lu\ne:%s\n", t.a, t.b, t.c, t.d, t.e);
             printf("Struct size: %u, read: %u\n", spb->struct_len, spb->real_len);
         } else perror("[SPB]");
     } else perror("[SPB]");