diff --git a/sdk/lib/ucrt/filesystem/chmod.cpp b/sdk/lib/ucrt/filesystem/chmod.cpp
index 63832ea2823..7aa34225374 100644
--- a/sdk/lib/ucrt/filesystem/chmod.cpp
+++ b/sdk/lib/ucrt/filesystem/chmod.cpp
@@ -7,7 +7,7 @@
 //
 #include <corecrt_internal.h>
 #include <io.h>
-#include <sys\stat.h>
+#include <sys/stat.h>
 #include <corecrt_internal_win32_buffer.h>
 
 // Changes the mode of a file.  The only supported mode bit is _S_IWRITE, which
diff --git a/sdk/lib/ucrt/filesystem/wchmod.cpp b/sdk/lib/ucrt/filesystem/wchmod.cpp
index 181afed05e4..24590200c71 100644
--- a/sdk/lib/ucrt/filesystem/wchmod.cpp
+++ b/sdk/lib/ucrt/filesystem/wchmod.cpp
@@ -7,7 +7,7 @@
 //
 #include <corecrt_internal.h>
 #include <io.h>
-#include <sys\stat.h>
+#include <sys/stat.h>
 
 
 
diff --git a/sdk/lib/ucrt/lowio/locking.cpp b/sdk/lib/ucrt/lowio/locking.cpp
index 8f7dda92b51..ab2d2e3106f 100644
--- a/sdk/lib/ucrt/lowio/locking.cpp
+++ b/sdk/lib/ucrt/lowio/locking.cpp
@@ -6,7 +6,7 @@
 // Defines _locking(), which locks and unlocks regions of a file.
 //
 #include <corecrt_internal_lowio.h>
-#include <sys\locking.h>
+#include <sys/locking.h>
 
 
 
@@ -106,7 +106,7 @@ extern "C" int __cdecl _locking(int const fh, int const locking_mode, long const
         {
             errno = EBADF;
             _doserrno = 0;
-            _ASSERTE(("Invalid file descriptor. File possibly closed by a different thread",0)); 
+            _ASSERTE(("Invalid file descriptor. File possibly closed by a different thread",0));
             __leave;
         }
 
diff --git a/sdk/lib/ucrt/lowio/umask.cpp b/sdk/lib/ucrt/lowio/umask.cpp
index ad0de502ccc..de90e192331 100644
--- a/sdk/lib/ucrt/lowio/umask.cpp
+++ b/sdk/lib/ucrt/lowio/umask.cpp
@@ -10,7 +10,7 @@
 *******************************************************************************/
 
 #include <corecrt_internal_lowio.h>
-#include <sys\stat.h>
+#include <sys/stat.h>
 
 extern "C" { int _umaskval = 0; }
 
diff --git a/sdk/lib/ucrt/time/clock.cpp b/sdk/lib/ucrt/time/clock.cpp
index 0c88322d562..7ff8a04e8fb 100644
--- a/sdk/lib/ucrt/time/clock.cpp
+++ b/sdk/lib/ucrt/time/clock.cpp
@@ -7,8 +7,8 @@
 // process started execution.
 //
 #include <corecrt_internal_time.h>
-#include <sys\timeb.h>
-#include <sys\types.h>
+#include <sys/timeb.h>
+#include <sys/types.h>
 
 
 
@@ -51,7 +51,7 @@ extern "C" int __cdecl __acrt_initialize_clock()
         !QueryPerformanceCounter(&local_start_count) ||
         local_frequency.QuadPart == 0)
     {
-        source_frequency = -1; 
+        source_frequency = -1;
         start_count      = -1;
         return 0;
     }