diff --git a/Documentation/sound/designs/compress-accel.rst b/Documentation/sound/designs/compress-accel.rst
index abf1f76a8778..c9c1744b94c2 100644
--- a/Documentation/sound/designs/compress-accel.rst
+++ b/Documentation/sound/designs/compress-accel.rst
@@ -57,7 +57,7 @@ from the input buffer size).
 State Machine
 =============
 
-The passthrough audio stream state machine is described below :
+The passthrough audio stream state machine is described below::
 
                                        +----------+
                                        |          |