diff --git a/include/X11/XKBlib.h b/include/X11/XKBlib.h
index dd532b22..27c63f70 100644
--- a/include/X11/XKBlib.h
+++ b/include/X11/XKBlib.h
@@ -297,7 +297,7 @@ extern	Bool	XkbIgnoreExtension(
 );
 
 extern	Display *XkbOpenDisplay(
-	char *			/* name */,
+	_Xconst char *		/* name */,
 	int *			/* ev_rtrn */,
 	int *			/* err_rtrn */,
 	int *			/* major_rtrn */,
diff --git a/man/xkb/XkbOpenDisplay.man b/man/xkb/XkbOpenDisplay.man
index 302984a3..41b20c0c 100644
--- a/man/xkb/XkbOpenDisplay.man
+++ b/man/xkb/XkbOpenDisplay.man
@@ -26,7 +26,7 @@ the library and the server, and initializes the extension for use.
 .SH SYNOPSIS
 .HP
 .B Display *XkbOpenDisplay
-.BI "(\^char *" "display_name" "\^,"
+.BI "(\^_Xconst char *" "display_name" "\^,"
 .BI "int *" "event_rtrn" "\^,"
 .BI "int *" "error_rtrn" "\^,"
 .BI "int *" "major_in_out" "\^,"
diff --git a/src/xkb/XKB.c b/src/xkb/XKB.c
index 055eb367..4df82b24 100644
--- a/src/xkb/XKB.c
+++ b/src/xkb/XKB.c
@@ -721,7 +721,7 @@ XkbGetPerClientControls(Display *dpy, unsigned *ctrls)
 }
 
 Display *
-XkbOpenDisplay(char *name,
+XkbOpenDisplay(_Xconst char *name,
                int *ev_rtrn,
                int *err_rtrn,
                int *major_rtrn,