diff --git a/reactos/include/psdk/windef.h b/reactos/include/psdk/windef.h
index a98ea8fe7b3..b6482917ba4 100644
--- a/reactos/include/psdk/windef.h
+++ b/reactos/include/psdk/windef.h
@@ -1,8 +1,5 @@
 #ifndef _WINDEF_H
 #define _WINDEF_H
-#if __GNUC__ >=3
-#pragma GCC system_header
-#endif
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/reactos/include/psdk/windows.h b/reactos/include/psdk/windows.h
index 34ab88dc7d6..aee8ca56d8d 100644
--- a/reactos/include/psdk/windows.h
+++ b/reactos/include/psdk/windows.h
@@ -12,9 +12,6 @@
 */
 #ifndef _WINDOWS_H
 #define _WINDOWS_H
-#if __GNUC__ >=3
-#pragma GCC system_header
-#endif
 
 #ifdef __GNUC__
 #include <msvctarget.h>
diff --git a/reactos/include/psdk/windowsx.h b/reactos/include/psdk/windowsx.h
index 460718e6409..0ed21e8fe04 100644
--- a/reactos/include/psdk/windowsx.h
+++ b/reactos/include/psdk/windowsx.h
@@ -1,8 +1,5 @@
 #ifndef _WINDOWSX_H
 #define _WINDOWSX_H
-#if __GNUC__ >=3
-#pragma GCC system_header
-#endif
 
 #define WM_CTLCOLOR 25
 #define Button_Enable(hwndCtl,fEnable) EnableWindow((hwndCtl),(fEnable))