diff --git a/src/mesa/main/config.h b/src/mesa/main/config.h
index ac69a9f5b2b..583aff10f1f 100644
--- a/src/mesa/main/config.h
+++ b/src/mesa/main/config.h
@@ -99,7 +99,7 @@
 #define MAX_TEXTURE_LEVELS 15
 
 /** Maximum rectangular texture size - GL_NV_texture_rectangle */
-#define MAX_TEXTURE_RECT_SIZE 16384
+#define MAX_TEXTURE_RECT_SIZE 65536
 
 /**
  * Maximum number of layers in a 1D or 2D array texture - GL_MESA_texture_array
@@ -214,7 +214,7 @@
 /** For GL_EXT_framebuffer_object */
 /*@{*/
 #define MAX_COLOR_ATTACHMENTS 8
-#define MAX_RENDERBUFFER_SIZE 16384
+#define MAX_RENDERBUFFER_SIZE 65536
 /*@}*/
 
 /** For GL_ATI_envmap_bump - support bump mapping on first 8 units */