diff --git a/glx/clientinfo.c b/glx/clientinfo.c
index b26ac1a72..4aaa4c967 100644
--- a/glx/clientinfo.c
+++ b/glx/clientinfo.c
@@ -29,10 +29,10 @@
 #include "glxbyteorder.h"
 #include "unpack.h"
 
-int
-__glXDisp_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc)
+static int
+set_client_info(__GLXclientState * cl, xGLXSetClientInfoARBReq * req,
+                unsigned bytes_per_version)
 {
-    xGLXSetClientInfoARBReq *req = (xGLXSetClientInfoARBReq *) pc;
     char *gl_extensions;
     char *glx_extensions;
 
@@ -40,7 +40,7 @@ __glXDisp_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc)
      * sizes specified for the various fields.
      */
     const unsigned expected_size = sz_xGLXSetClientInfoARBReq
-        + (req->numVersions * 8)
+        + (req->numVersions * bytes_per_version)
         + __GLX_PAD(req->numGLExtensionBytes)
         + __GLX_PAD(req->numGLXExtensionBytes);
 
@@ -50,7 +50,7 @@ __glXDisp_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc)
     /* Verify that the actual length of the GL extension string matches what's
      * encoded in protocol packet.
      */
-    gl_extensions = (char *) (req + 1) + (req->numVersions * 8);
+    gl_extensions = (char *) (req + 1) + (req->numVersions * bytes_per_version);
     if (req->numGLExtensionBytes != 0
         && memchr(gl_extensions, 0,
                   __GLX_PAD(req->numGLExtensionBytes)) == NULL)
@@ -71,6 +71,12 @@ __glXDisp_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc)
     return 0;
 }
 
+int
+__glXDisp_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc)
+{
+    return set_client_info(cl, (xGLXSetClientInfoARBReq *) pc, 8);
+}
+
 int
 __glXDispSwap_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc)
 {
@@ -87,11 +93,18 @@ __glXDispSwap_SetClientInfoARB(__GLXclientState * cl, GLbyte * pc)
 int
 __glXDisp_SetClientInfo2ARB(__GLXclientState * cl, GLbyte * pc)
 {
-    return BadRequest;
+    return set_client_info(cl, (xGLXSetClientInfoARBReq *) pc, 12);
 }
 
 int
 __glXDispSwap_SetClientInfo2ARB(__GLXclientState * cl, GLbyte * pc)
 {
-    return BadRequest;
+    xGLXSetClientInfoARBReq *req = (xGLXSetClientInfoARBReq *) pc;
+
+    req->length = bswap_16(req->length);
+    req->numVersions = bswap_32(req->numVersions);
+    req->numGLExtensionBytes = bswap_32(req->numGLExtensionBytes);
+    req->numGLXExtensionBytes = bswap_32(req->numGLXExtensionBytes);
+
+    return __glXDisp_SetClientInfo2ARB(cl, pc);
 }