diff --git a/audio/effect/2.0/IAcousticEchoCancelerEffect.hal b/audio/effect/2.0/IAcousticEchoCancelerEffect.hal
index 9e2e0c3..b5f94a5 100644
--- a/audio/effect/2.0/IAcousticEchoCancelerEffect.hal
+++ b/audio/effect/2.0/IAcousticEchoCancelerEffect.hal
@@ -20,12 +20,12 @@
 import IEffect;
 
 interface IAcousticEchoCancelerEffect extends IEffect {
-    /*
+    /**
      * Sets echo delay value in milliseconds.
      */
     setEchoDelay(uint32_t echoDelayMs) generates (Result retval);
 
-    /*
+    /**
      * Gets echo delay value in milliseconds.
      */
     getEchoDelay() generates (Result retval, uint32_t echoDelayMs);