Document --use-pixman option
diff --git a/man/weston.man b/man/weston.man
index 228cfe5..0e520e0 100644
--- a/man/weston.man
+++ b/man/weston.man
@@ -163,6 +163,11 @@
\fB\-\-width\fR=\fIW\fR, \fB\-\-height\fR=\fIH\fR
Make the default size of each X window
.IR W x H " pixels."
+.TP
+.B \-\-use\-pixman
+Use the pixman renderer. By default weston will try to use EGL and
+GLES2 for rendering. Passing this option will make weston use the
+pixman library for software compsiting.
.
.\" ***************************************************************
.SH FILES
diff --git a/src/compositor.c b/src/compositor.c
index e556766..cd11f6b 100644
--- a/src/compositor.c
+++ b/src/compositor.c
@@ -3214,6 +3214,7 @@
" --width=WIDTH\t\tWidth of X window\n"
" --height=HEIGHT\tHeight of X window\n"
" --fullscreen\t\tRun in fullscreen mode\n"
+ " --use-pixman\t\tUse the pixman (CPU) renderer\n"
" --output-count=COUNT\tCreate multiple outputs\n"
" --no-input\t\tDont create input devices\n\n");