diff --git a/glx/glxcmds.c b/glx/glxcmds.c
index 3ef567d10..0b375c382 100644
--- a/glx/glxcmds.c
+++ b/glx/glxcmds.c
@@ -1436,7 +1436,7 @@ int __glXDisp_CreateGLXPbufferSGIX(__GLXclientState *cl, GLbyte *pc)
     ClientPtr client = cl->client;
     xGLXCreateGLXPbufferSGIXReq *req = (xGLXCreateGLXPbufferSGIXReq *) pc;
 
-    REQUEST_SIZE_MATCH(xGLXCreateGLXPbufferSGIXReq);
+    REQUEST_AT_LEAST_SIZE(xGLXCreateGLXPbufferSGIXReq);
 
     return DoCreatePbuffer(cl->client, req->screen, req->fbconfig,
 			   req->width, req->height, req->pbuffer);
diff --git a/glx/glxcmdsswap.c b/glx/glxcmdsswap.c
index 3bb4cade9..9d96c9de3 100644
--- a/glx/glxcmdsswap.c
+++ b/glx/glxcmdsswap.c
@@ -421,7 +421,7 @@ int __glXDispSwap_CreateGLXPbufferSGIX(__GLXclientState *cl, GLbyte *pc)
     xGLXCreateGLXPbufferSGIXReq *req = (xGLXCreateGLXPbufferSGIXReq *) pc;    
     __GLX_DECLARE_SWAP_VARIABLES;
 
-    REQUEST_SIZE_MATCH(xGLXCreateGLXPbufferSGIXReq);
+    REQUEST_AT_LEAST_SIZE(xGLXCreateGLXPbufferSGIXReq);
 
     __GLX_SWAP_INT(&req->screen);
     __GLX_SWAP_INT(&req->fbconfig);