diff --git a/docs/handbook/concepts.rst b/docs/handbook/concepts.rst
index 45c662bd669..0aa2f1119f6 100644
--- a/docs/handbook/concepts.rst
+++ b/docs/handbook/concepts.rst
@@ -31,7 +31,7 @@ INT32 and a 32-bit floating point pixel has the range of FLOAT32. The current re
 supports the following standard modes:
 
     * ``1`` (1-bit pixels, black and white, stored with one pixel per byte)
-    * ``L`` (8-bit pixels, black and white)
+    * ``L`` (8-bit pixels, grayscale)
     * ``P`` (8-bit pixels, mapped to any other mode using a color palette)
     * ``RGB`` (3x8-bit pixels, true color)
     * ``RGBA`` (4x8-bit pixels, true color with transparency mask)