diff --git a/src/cairo.c b/src/cairo.c
index 49cdbcf60..21fad0d3b 100644
--- a/src/cairo.c
+++ b/src/cairo.c
@@ -844,7 +844,7 @@ slim_hidden_def (cairo_set_operator);
 
 
 #if 0
-/**
+/*
  * cairo_set_opacity:
  * @cr: a #cairo_t
  * @opacity: the level of opacity to use when compositing
@@ -856,7 +856,7 @@ slim_hidden_def (cairo_set_operator);
  * The default opacity is 1.
  *
  * Since: TBD
- **/
+ */
 void
 cairo_set_opacity (cairo_t *cr, double opacity)
 {