diff --git a/reactos/lib/sdk/crt/math/abs.c b/reactos/lib/sdk/crt/math/abs.c
index a95798b8de4..a18f19b2666 100644
--- a/reactos/lib/sdk/crt/math/abs.c
+++ b/reactos/lib/sdk/crt/math/abs.c
@@ -1,13 +1,10 @@
 /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
-#include <stdlib.h>
 
 /*
  * @implemented
  */
-#ifndef _MSC_VER
 int
 abs(int j)
 {
   return j<0 ? -j : j;
 }
-#endif
diff --git a/reactos/lib/sdk/crt/math/labs.c b/reactos/lib/sdk/crt/math/labs.c
index e19c211c99b..b4fc33ec0a0 100644
--- a/reactos/lib/sdk/crt/math/labs.c
+++ b/reactos/lib/sdk/crt/math/labs.c
@@ -1,13 +1,10 @@
 /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
-#include <precomp.h>
 
 /*
  * @implemented
  */
-#ifndef _MSC_VER
 long
 labs(long j)
 {
   return j<0 ? -j : j;
 }
-#endif
diff --git a/reactos/lib/sdk/crt/string/strset.c b/reactos/lib/sdk/crt/string/strset.c
index db44dd26f8d..e6c422d4f9c 100644
--- a/reactos/lib/sdk/crt/string/strset.c
+++ b/reactos/lib/sdk/crt/string/strset.c
@@ -8,7 +8,15 @@
  *              25/11/05: Added license header
  */
 
-#include <precomp.h>
+#if defined(__GNUC__)
+#define __int64 long long
+#endif
+
+#ifdef _WIN64
+typedef unsigned __int64 size_t;
+#else
+typedef unsigned int size_t;
+#endif
 
 /*
  * @implemented
@@ -30,7 +38,6 @@ char* _strnset(char* szToFill, int szFill, size_t sizeMaxFill)
 /*
  * @implemented
  */
-#ifndef _MSC_VER
 char* _strset(char* szToFill, int szFill)
 {
 	char *t = szToFill;
@@ -42,4 +49,3 @@ char* _strset(char* szToFill, int szFill)
 	}
 	return t;
 }
-#endif