diff --git a/reactos/lib/dbghelp/module.c b/reactos/lib/dbghelp/module.c
index 4df3bd35460..ea5a955d93f 100644
--- a/reactos/lib/dbghelp/module.c
+++ b/reactos/lib/dbghelp/module.c
@@ -22,7 +22,6 @@
 #include "config.h"
 #include <stdlib.h>
 #include <stdio.h>
-#include <ctype.h>
 #include <string.h>
 #include <assert.h>
 
diff --git a/reactos/lib/dbghelp/path.c b/reactos/lib/dbghelp/path.c
index 08238d3ebbe..604998fde3e 100644
--- a/reactos/lib/dbghelp/path.c
+++ b/reactos/lib/dbghelp/path.c
@@ -21,7 +21,6 @@
 #include "config.h"
 #include <stdlib.h>
 #include <stdio.h>
-#include <ctype.h>
 #include <string.h>
 
 #include "dbghelp_private.h"
diff --git a/reactos/lib/dbghelp/stabs.c b/reactos/lib/dbghelp/stabs.c
index 368ec0138b9..0104fdd9829 100644
--- a/reactos/lib/dbghelp/stabs.c
+++ b/reactos/lib/dbghelp/stabs.c
@@ -39,7 +39,6 @@
 #endif
 #include <limits.h>
 #include <stdlib.h>
-#include <ctype.h>
 #include <string.h>
 #ifdef HAVE_UNISTD_H
 # include <unistd.h>
diff --git a/reactos/lib/oleaut32/vartype.c b/reactos/lib/oleaut32/vartype.c
index ebdaf5c09ed..2e771e8ce75 100644
--- a/reactos/lib/oleaut32/vartype.c
+++ b/reactos/lib/oleaut32/vartype.c
@@ -29,7 +29,6 @@
 #include "winnt.h"
 #include "variant.h"
 #include "resource.h"
-#include <ctype.h>
 
 WINE_DEFAULT_DEBUG_CHANNEL(variant);
 
diff --git a/reactos/lib/shell32/shfldr_mycomp.c b/reactos/lib/shell32/shfldr_mycomp.c
index 488c6079eb6..98b5d62fbf8 100644
--- a/reactos/lib/shell32/shfldr_mycomp.c
+++ b/reactos/lib/shell32/shfldr_mycomp.c
@@ -26,7 +26,6 @@
 #include <string.h>
 #include <stdarg.h>
 #include <stdio.h>
-#include <ctype.h>
 
 #define COBJMACROS
 #define NONAMELESSUNION
diff --git a/reactos/lib/shlwapi/path.c b/reactos/lib/shlwapi/path.c
index 4d6c51e3396..bb1c3f21e03 100644
--- a/reactos/lib/shlwapi/path.c
+++ b/reactos/lib/shlwapi/path.c
@@ -25,7 +25,6 @@
 #include <stdarg.h>
 #include <string.h>
 #include <stdlib.h>
-#include <ctype.h>
 
 #include "wine/unicode.h"
 #include "windef.h"
diff --git a/reactos/lib/uxtheme/msstyles.c b/reactos/lib/uxtheme/msstyles.c
index 90478c9ed11..9ce1d17155c 100644
--- a/reactos/lib/uxtheme/msstyles.c
+++ b/reactos/lib/uxtheme/msstyles.c
@@ -21,7 +21,6 @@
 #include "config.h"
 
 #include <stdarg.h>
-#include <ctype.h>
 
 #include "windef.h"
 #include "winbase.h"
diff --git a/reactos/lib/uxtheme/uxini.c b/reactos/lib/uxtheme/uxini.c
index 43864cd92f0..aaf3b122de6 100644
--- a/reactos/lib/uxtheme/uxini.c
+++ b/reactos/lib/uxtheme/uxini.c
@@ -21,7 +21,6 @@
 #include "config.h"
 
 #include <stdarg.h>
-#include <ctype.h>
 
 #include "windef.h"
 #include "winbase.h"
diff --git a/reactos/lib/wininet/ftp.c b/reactos/lib/wininet/ftp.c
index e9093bd8ea3..77f16a0d075 100644
--- a/reactos/lib/wininet/ftp.c
+++ b/reactos/lib/wininet/ftp.c
@@ -34,7 +34,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <ctype.h>
 #include <sys/types.h>
 #ifdef HAVE_SYS_SOCKET_H
 # include <sys/socket.h>