diff --git a/src/gallium/docs/source/context.rst b/src/gallium/docs/source/context.rst
index f241411a002..8250c30f2ab 100644
--- a/src/gallium/docs/source/context.rst
+++ b/src/gallium/docs/source/context.rst
@@ -63,7 +63,9 @@ objects. They all follow simple, one-method binding calls, e.g.
 * ``set_scissor_state`` sets the bounds for the scissor test, which culls
   pixels before blending to render targets. If the :ref:`Rasterizer` does
   not have the scissor test enabled, then the scissor bounds never need to
-  be set since they will not be used.
+  be set since they will not be used.  Note that scissor xmin and ymin are
+  inclusive, but  xmax and ymax are exclusive.  The inclusive ranges in x
+  and y would be [xmin..xmax-1] and [ymin..ymax-1].
 * ``set_viewport_state``