diff --git a/include/X11/Xfuncproto.h b/include/X11/Xfuncproto.h
index 89bc96fddb5557cfa7424b10df20a995441dd973..f689073602310eccafe6c5b1b39f40f2a47f6ade 100644
--- a/include/X11/Xfuncproto.h
+++ b/include/X11/Xfuncproto.h
@@ -218,4 +218,12 @@ in this Software without prior written authorization from The Open Group.
 # define _X_NOTSAN
 #endif
 
+/* Mark a char array/pointer as not containing a NUL-terminated string */
+/* requires xproto >= 7.0.33 */
+#if __has_attribute(nonstring)
+# define _X_NONSTRING __attribute__((nonstring))
+#else
+# define _X_NONSTRING
+#endif
+
 #endif /* _XFUNCPROTO_H_ */
diff --git a/include/X11/extensions/XKBproto.h b/include/X11/extensions/XKBproto.h
index 43b18d8b5427db479664ffed479fc9678e9fb9c4..6eaec952f59e62db10d25fb643acb2ffb9c014c1 100644
--- a/include/X11/extensions/XKBproto.h
+++ b/include/X11/extensions/XKBproto.h
@@ -28,6 +28,7 @@ THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #define	_XKBPROTO_H_
 
 #include <X11/Xmd.h>
+#include <X11/Xfuncproto.h>
 #include <X11/extensions/XKB.h>
 
 #define Window CARD32
@@ -675,7 +676,7 @@ typedef struct _xkbRowWireDesc {
 #define	sz_xkbRowWireDesc	8
 
 typedef struct _xkbKeyWireDesc {
-    CARD8	name[XkbKeyNameLength];
+    CARD8	name[XkbKeyNameLength]	_X_NONSTRING;
     INT16	gap;
     CARD8	shapeNdx;
     CARD8	colorNdx;
@@ -698,8 +699,8 @@ typedef struct _xkbOverlayRowWireDesc {
 #define	sz_xkbOverlayRowWireDesc	4
 
 typedef struct _xkbOverlayKeyWireDesc {
-   CARD8	over[XkbKeyNameLength];
-   CARD8	under[XkbKeyNameLength];
+   CARD8	over[XkbKeyNameLength]	_X_NONSTRING;
+   CARD8	under[XkbKeyNameLength]	_X_NONSTRING;
 } xkbOverlayKeyWireDesc;
 #define	sz_xkbOverlayKeyWireDesc	8
 
diff --git a/include/X11/extensions/XKBstr.h b/include/X11/extensions/XKBstr.h
index ef26911f94e15368f1bedea06459ae9fdbbf7fc5..eaefae8220de72a391a05f41980fac34b9194547 100644
--- a/include/X11/extensions/XKBstr.h
+++ b/include/X11/extensions/XKBstr.h
@@ -27,6 +27,7 @@ THE USE OR PERFORMANCE OF THIS SOFTWARE.
 #ifndef _XKBSTR_H_
 #define	_XKBSTR_H_
 
+#include <X11/Xfuncproto.h>
 #include <X11/extensions/XKB.h>
 
 #define	XkbCharToInt(v)		((v)&0x80?(int)((v)|(~0xff)):(int)((v)&0x7f))
@@ -401,12 +402,12 @@ typedef struct _XkbIndicatorRec {
 } XkbIndicatorRec,*XkbIndicatorPtr;
 
 typedef	struct _XkbKeyNameRec {
-	char	name[XkbKeyNameLength];
+	char	name[XkbKeyNameLength]	_X_NONSTRING;
 } XkbKeyNameRec,*XkbKeyNamePtr;
 
 typedef struct _XkbKeyAliasRec {
-	char	real[XkbKeyNameLength];
-	char	alias[XkbKeyNameLength];
+	char	real[XkbKeyNameLength]	_X_NONSTRING;
+	char	alias[XkbKeyNameLength]	_X_NONSTRING;
 } XkbKeyAliasRec,*XkbKeyAliasPtr;
 
 	/*
diff --git a/xproto.pc.in b/xproto.pc.in
index 927423675a9a4ebc613b772e4fe634f48df72a2d..9e288c717b1b5e27775637c05d6f94e25716d7e2 100644
--- a/xproto.pc.in
+++ b/xproto.pc.in
@@ -4,5 +4,5 @@ includex11dir=@includedir@/X11
  
 Name: Xproto
 Description: Xproto headers
-Version: 7.0.32
+Version: 7.0.33
 Cflags: -I${includedir}