diff --git a/src/com/android/phone/PhoneGlobals.java b/src/com/android/phone/PhoneGlobals.java
index 252dbc1..133b65f 100644
--- a/src/com/android/phone/PhoneGlobals.java
+++ b/src/com/android/phone/PhoneGlobals.java
@@ -412,9 +412,9 @@
                     android.provider.Settings.System.HEARING_AID,
                     0);
             AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
-            audioManager.setParameter(SettingsConstants.HAC_KEY,
-                    hac == SettingsConstants.HAC_ENABLED
-                            ? SettingsConstants.HAC_VAL_ON : SettingsConstants.HAC_VAL_OFF);
+            audioManager.setParameters(
+                    SettingsConstants.HAC_KEY + "=" + (hac == SettingsConstants.HAC_ENABLED
+                            ? SettingsConstants.HAC_VAL_ON : SettingsConstants.HAC_VAL_OFF));
         }
     }
 
diff --git a/src/com/android/phone/settings/AccessibilitySettingsFragment.java b/src/com/android/phone/settings/AccessibilitySettingsFragment.java
index 3069091..942f28c 100644
--- a/src/com/android/phone/settings/AccessibilitySettingsFragment.java
+++ b/src/com/android/phone/settings/AccessibilitySettingsFragment.java
@@ -157,9 +157,9 @@
             Settings.System.putInt(mContext.getContentResolver(), Settings.System.HEARING_AID, hac);
 
             // Update HAC Value in AudioManager.
-            mAudioManager.setParameter(SettingsConstants.HAC_KEY,
-                    hac == SettingsConstants.HAC_ENABLED
-                            ? SettingsConstants.HAC_VAL_ON : SettingsConstants.HAC_VAL_OFF);
+            mAudioManager.setParameters(
+                    SettingsConstants.HAC_KEY + "=" + (hac == SettingsConstants.HAC_ENABLED
+                            ? SettingsConstants.HAC_VAL_ON : SettingsConstants.HAC_VAL_OFF));
             return true;
         } else if (preference == mButtonRtt) {
             Log.i(LOG_TAG, "RTT setting changed -- now " + mButtonRtt.isChecked());