diff --git a/libImaging/TiffDecode.h b/libImaging/TiffDecode.h
index 90fe3c9d4..70aa63628 100644
--- a/libImaging/TiffDecode.h
+++ b/libImaging/TiffDecode.h
@@ -13,11 +13,12 @@
 #include <tiff.h>
 #endif
 
-#ifndef _UNISTD_H
-#include <unistd.h>
+#ifndef _MSC_VER
+	#ifndef _UNISTD_H
+	#include <unistd.h>
+	#endif
 #endif
 
-
 #ifndef min
 #define min(x,y) (( x > y ) ? y : x )
 #define max(x,y) (( x < y ) ? y : x )