diff --git a/MSVC/minetestmapper.vcxproj b/MSVC/minetestmapper.vcxproj
index 1d53c05..d1841cf 100644
--- a/MSVC/minetestmapper.vcxproj
+++ b/MSVC/minetestmapper.vcxproj
@@ -178,6 +178,7 @@
     <ClInclude Include="..\PixelAttributes.h" />
     <ClInclude Include="..\PlayerAttributes.h" />
     <ClInclude Include="..\porting.h" />
+    <ClInclude Include="..\porting_win32.h" />
     <ClInclude Include="..\Settings.h" />
     <ClInclude Include="..\TileGenerator.h" />
     <ClInclude Include="..\types.h" />
diff --git a/MSVC/minetestmapper.vcxproj.filters b/MSVC/minetestmapper.vcxproj.filters
index 31f18d9..8bbdb73 100644
--- a/MSVC/minetestmapper.vcxproj.filters
+++ b/MSVC/minetestmapper.vcxproj.filters
@@ -54,6 +54,9 @@
     <ClInclude Include="..\porting.h">
       <Filter>Header files</Filter>
     </ClInclude>
+    <ClInclude Include="..\porting_win32.h">
+      <Filter>Header files</Filter>
+    </ClInclude>
     <ClInclude Include="resource.h">
       <Filter>Header files</Filter>
     </ClInclude>
diff --git a/porting.h b/porting.h
index c093beb..cb692b9 100644
--- a/porting.h
+++ b/porting.h
@@ -2,15 +2,9 @@
 #define _PORTING_H
 
 #ifdef _WIN32
-
-#include <windows.h>
-#define sleepMs(x) Sleep(x)
-
+#include "porting_win32.h"
 #else
-
-#include <unistd.h>
-#define sleepMs(x) usleep(x*1000)
-
+#include "porting_posix.h"
 #endif
 
 #ifdef _MSC_VER
@@ -20,3 +14,4 @@
 #endif
 
 #endif // _PORTING_H
+
diff --git a/porting_posix.h b/porting_posix.h
new file mode 100644
index 0000000..6365526
--- /dev/null
+++ b/porting_posix.h
@@ -0,0 +1,30 @@
+
+#include <ctime>
+#include <cerrno>
+#include <unistd.h>
+#include <sys/time.h>
+
+#define sleepMs(x) usleep((x)*1000)
+
+inline uint64_t getRelativeTimeStampMs()
+{
+	int rv = -1;
+	struct timespec ts;
+	#ifdef CLOCK_MONOTONIC_RAW
+	if (rv == -1)
+		rv = clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
+	#endif
+	#ifdef _POSIX_MONOTONIC_CLOCK
+	if (rv == -1)
+		rv = clock_gettime(CLOCK_MONOTONIC, &ts);
+	#endif
+	if (rv == -1) {
+		struct timeval tv;
+		gettimeofday(&tv, NULL);
+		return tv.tv_sec * 1000 + tv.tv_usec / 1000;
+	}
+	else {
+		return ts.tv_sec * 1000 + ts.tv_nsec / 1000000;
+	}
+}
+
diff --git a/porting_win32.h b/porting_win32.h
new file mode 100644
index 0000000..7a3f8ab
--- /dev/null
+++ b/porting_win32.h
@@ -0,0 +1,10 @@
+
+#include <windows.h>
+
+#define sleepMs(x) Sleep(x)
+
+inline uint64_t getRelativeTimeStampMs()
+{
+	return GetTickCount64();
+}
+