diff --git a/src/win32/protect.c b/src/win32/protect.c
index 5de43695..0e026903 100644
--- a/src/win32/protect.c
+++ b/src/win32/protect.c
@@ -2,10 +2,11 @@
 #include <stdlib.h>
 #include <stdint.h>
 #include <string.h>
+#include <time.h>
 #include <zlib.h>
 #include "protect.h"
 
-static void *memmem(uint8_t *haystack, size_t haystacklen, uint8_t *needle, size_t needlelen)
+static uint8_t *memmem(const uint8_t *haystack, size_t haystacklen, const uint8_t *needle, size_t needlelen)
 {
   if (needlelen <= haystacklen)
   {
@@ -14,7 +15,7 @@ static void *memmem(uint8_t *haystack, size_t haystacklen, uint8_t *needle, size
     {
       if (!memcmp(haystack, needle, needlelen))
       {
-        return((char *)haystack);
+        return((uint8_t *)haystack);
       }
       ++haystack;
     }
@@ -64,7 +65,7 @@ int ExecutableValid(const char *executable_filename)
       rewind(fp);
       fread(buffer, 1, file_size, fp);
 
-      if ((p  = memmem(buffer, file_size, (const void *)data, sizeof(data))))
+      if ((p  = memmem(buffer, file_size, (const uint8_t *)data, sizeof(data))))
       {
         size_t length_till_data = p-buffer;
         uint32_t crc1, crc2, crc3, crc4;
diff --git a/src/win32/protect.h b/src/win32/protect.h
index 0457c90b..3344b047 100644
--- a/src/win32/protect.h
+++ b/src/win32/protect.h
@@ -1,5 +1,5 @@
-//#ifdef PROTECT_H
-//#define PROTECT_H
+#ifdef ___PROTECT_H_
+#define ___PROTECT_H_
 
 #if defined(__cplusplus)
 extern "C" {
@@ -13,4 +13,4 @@ int ExecutableValid(const char *executable_filename);
 }
 #endif
 
-//#endif
+#endif