diff --git a/compress.cpp b/compress.cpp
index f43647b5..e382ff3f 100644
--- a/compress.cpp
+++ b/compress.cpp
@@ -25,7 +25,9 @@
 #include <string.h>
 #include <sstream>
 #include <stdio.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 #ifdef HAVE_CONFIG_H
 #include <config.h>
diff --git a/engines/agos/compress_agos.cpp b/engines/agos/compress_agos.cpp
index 74bae7af..2287abe7 100644
--- a/engines/agos/compress_agos.cpp
+++ b/engines/agos/compress_agos.cpp
@@ -22,7 +22,9 @@
 
 #include <string.h>
 #include <stdio.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 #include "compress_agos.h"
 
diff --git a/engines/kyra/compress_kyra.cpp b/engines/kyra/compress_kyra.cpp
index c5a109da..e8057683 100644
--- a/engines/kyra/compress_kyra.cpp
+++ b/engines/kyra/compress_kyra.cpp
@@ -23,7 +23,9 @@
 #include <assert.h>
 #include <stdlib.h>
 #include <stdio.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 
 #include "compress_kyra.h"
diff --git a/engines/kyra/kyra_pak.cpp b/engines/kyra/kyra_pak.cpp
index 7a15d274..9e1f70ba 100644
--- a/engines/kyra/kyra_pak.cpp
+++ b/engines/kyra/kyra_pak.cpp
@@ -22,7 +22,9 @@
 
 #include <assert.h>
 #include <stdio.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 #include "kyra_pak.h"
 
diff --git a/engines/queen/compress_queen.cpp b/engines/queen/compress_queen.cpp
index eec3ab06..ef3a3c20 100644
--- a/engines/queen/compress_queen.cpp
+++ b/engines/queen/compress_queen.cpp
@@ -21,7 +21,9 @@
  */
 
 #include <string.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 #include "common/util.h"
 #include "compress.h"
diff --git a/engines/saga/compress_saga.cpp b/engines/saga/compress_saga.cpp
index ad05ef1d..304a2cd1 100644
--- a/engines/saga/compress_saga.cpp
+++ b/engines/saga/compress_saga.cpp
@@ -25,7 +25,9 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 #include "compress.h"
 #include "compress_saga.h"
diff --git a/engines/sci/compress_sci.cpp b/engines/sci/compress_sci.cpp
index 6c165abc..d45a5a70 100644
--- a/engines/sci/compress_sci.cpp
+++ b/engines/sci/compress_sci.cpp
@@ -23,6 +23,9 @@
 // by m_kiewitz
 
 #include <stdlib.h>
+#ifndef _MSC_VER
+#include <unistd.h>
+#endif
 
 #include "compress.h"
 #include "common/endian.h"
diff --git a/engines/scumm/compress_scumm_bun.cpp b/engines/scumm/compress_scumm_bun.cpp
index c3af7ebb..65b09f6d 100644
--- a/engines/scumm/compress_scumm_bun.cpp
+++ b/engines/scumm/compress_scumm_bun.cpp
@@ -24,7 +24,9 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 #include "common/util.h"
 #include "common/endian.h"
diff --git a/engines/scumm/compress_scumm_san.cpp b/engines/scumm/compress_scumm_san.cpp
index 06bfbe78..1921424f 100644
--- a/engines/scumm/compress_scumm_san.cpp
+++ b/engines/scumm/compress_scumm_san.cpp
@@ -25,7 +25,9 @@
 #include <string.h>
 #include <zlib.h>
 #include <stdio.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 #include "compress_scumm_san.h"
 #include "common/endian.h"
diff --git a/engines/scumm/compress_scumm_sou.cpp b/engines/scumm/compress_scumm_sou.cpp
index 9c315254..6234decf 100644
--- a/engines/scumm/compress_scumm_sou.cpp
+++ b/engines/scumm/compress_scumm_sou.cpp
@@ -22,7 +22,9 @@
 
 #include <assert.h>
 #include <string.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 #include "compress_scumm_sou.h"
 
diff --git a/engines/sword1/compress_sword1.cpp b/engines/sword1/compress_sword1.cpp
index 946b8fee..3ea7a557 100644
--- a/engines/sword1/compress_sword1.cpp
+++ b/engines/sword1/compress_sword1.cpp
@@ -24,7 +24,9 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 #include "compress_sword1.h"
 
diff --git a/engines/sword2/compress_sword2.cpp b/engines/sword2/compress_sword2.cpp
index 0abed513..6286eaac 100644
--- a/engines/sword2/compress_sword2.cpp
+++ b/engines/sword2/compress_sword2.cpp
@@ -20,7 +20,9 @@
  *
  */
 
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 #include "compress_sword2.h"
 
diff --git a/engines/tinsel/compress_tinsel.cpp b/engines/tinsel/compress_tinsel.cpp
index 674930c0..4b944845 100644
--- a/engines/tinsel/compress_tinsel.cpp
+++ b/engines/tinsel/compress_tinsel.cpp
@@ -23,7 +23,9 @@
 // By Jimi (m [underline] kiewitz [AT] users.sourceforge.net)
 
 #include <stdlib.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 #include "compress.h"
 #include "common/endian.h"
diff --git a/engines/touche/compress_touche.cpp b/engines/touche/compress_touche.cpp
index 772972cf..4d29438c 100644
--- a/engines/touche/compress_touche.cpp
+++ b/engines/touche/compress_touche.cpp
@@ -22,7 +22,9 @@
 
 #include <string.h>
 #include <stdio.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 #include "compress.h"
 #include "compress_touche.h"
diff --git a/engines/tucker/compress_tucker.cpp b/engines/tucker/compress_tucker.cpp
index c07ca01d..4b51b478 100644
--- a/engines/tucker/compress_tucker.cpp
+++ b/engines/tucker/compress_tucker.cpp
@@ -23,7 +23,9 @@
 #include <assert.h>
 #include <string.h>
 #include <stdio.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 #include "common/util.h"
 #include "compress.h"