diff --git a/engines/sci/gfx/gfx_res_options.cpp b/engines/sci/gfx/gfx_res_options.cpp
index f665b501418..c07ba964215 100644
--- a/engines/sci/gfx/gfx_res_options.cpp
+++ b/engines/sci/gfx/gfx_res_options.cpp
@@ -27,8 +27,6 @@
 #include "sci/gfx/gfx_options.h"
 #include "sci/gfx/gfx_resmgr.h"
 
-#include <ctype.h>
-
 namespace Sci {
 
 //#define DEBUG
diff --git a/engines/sci/gfx/sbtree.h b/engines/sci/gfx/sbtree.h
index f3c77cf932b..c00c543e724 100644
--- a/engines/sci/gfx/sbtree.h
+++ b/engines/sci/gfx/sbtree.h
@@ -32,10 +32,6 @@
 #ifndef SCI_GFX_GFX_SBTREE_H
 #define SCI_GFX_GFX_SBTREE_H
 
-#ifdef SBTREE_DEBUG
-#  include <stdio.h>
-#endif
-
 namespace Sci {
 
 struct sbtree_t {
diff --git a/engines/sci/sci.cpp b/engines/sci/sci.cpp
index a1df4a28941..88829e3d545 100644
--- a/engines/sci/sci.cpp
+++ b/engines/sci/sci.cpp
@@ -33,10 +33,6 @@
 #include "sci/include/engine.h"
 #include "sci/engine/kernel.h"
 
-#ifdef WIN32
-#  include <direct.h>
-#endif
-
 namespace Sci {
 
 extern gfx_driver_t gfx_driver_scummvm;
diff --git a/engines/sci/sfx/core.cpp b/engines/sci/sfx/core.cpp
index 3ccf38115cf..54dde65ca5c 100644
--- a/engines/sci/sfx/core.cpp
+++ b/engines/sci/sfx/core.cpp
@@ -25,8 +25,6 @@
 
 /* Sound subsystem core: Event handler, sound player dispatching */
 
-#include <stdio.h>
-
 #include "sci/tools.h"
 #include "sci/sfx/sfx_timer.h"
 #include "sci/sfx/sfx_iterator_internal.h"
diff --git a/engines/sci/sfx/iterator.cpp b/engines/sci/sfx/iterator.cpp
index 092bed9288d..8c6f82c62e8 100644
--- a/engines/sci/sfx/iterator.cpp
+++ b/engines/sci/sfx/iterator.cpp
@@ -25,7 +25,6 @@
 
 /* Song iterators */
 
-#include <stdio.h>
 #include "common/util.h"
 #include "sci/sfx/sfx_iterator_internal.h"
 #include "sci/sfx/sfx_player.h"
diff --git a/engines/sci/sfx/softseq/opl2.cpp b/engines/sci/sfx/softseq/opl2.cpp
index 7dbe423eaa1..fa1fc54a0e9 100644
--- a/engines/sci/sfx/softseq/opl2.cpp
+++ b/engines/sci/sfx/softseq/opl2.cpp
@@ -46,7 +46,6 @@
 #include "sci/sfx/sfx_iterator.h"
 #include "../softseq.h"
 #include "../adlib.h"
-#include <math.h>
 
 #include "sound/fmopl.h"
 
diff --git a/engines/sci/sfx/softseq/softsequencers.cpp b/engines/sci/sfx/softseq/softsequencers.cpp
index 8ab3aa61abf..f206c8b8cef 100644
--- a/engines/sci/sfx/softseq/softsequencers.cpp
+++ b/engines/sci/sfx/softseq/softsequencers.cpp
@@ -23,10 +23,6 @@
  *
  */
 
-#ifdef HAVE_CONFIG_H
-#  include <config.h>
-#endif
-
 #include "../softseq.h"
 
 namespace Sci {
diff --git a/engines/sci/sfx/songlib.cpp b/engines/sci/sfx/songlib.cpp
index 6b2703b95b6..61b564004f8 100644
--- a/engines/sci/sfx/songlib.cpp
+++ b/engines/sci/sfx/songlib.cpp
@@ -23,8 +23,6 @@
  *
  */
 
-#include <stdio.h>
-
 #include "sci/tools.h"
 #include "sci/sfx/sfx_engine.h"
 #include "sci/sci_memory.h"
diff --git a/engines/sci/tools.cpp b/engines/sci/tools.cpp
index 58c86cd73a7..b3c2fa7d190 100644
--- a/engines/sci/tools.cpp
+++ b/engines/sci/tools.cpp
@@ -25,16 +25,6 @@
 
 #include "common/scummsys.h"
 
-#ifdef WIN32
-#  include <windows.h>
-#  include <errno.h>
-#  include <mmsystem.h>
-#  include <sys/types.h>
-#  include <sys/stat.h>
-#  include <direct.h>
-#  undef ARRAYSIZE
-#endif
-
 #include "common/util.h"
 #include "common/str.h"