diff --git a/res/drawable-xhdpi/options_add_call_over.png b/res/drawable-xhdpi/options_add_call_over.png
new file mode 100644
index 000000000..7dcaf44d0
Binary files /dev/null and b/res/drawable-xhdpi/options_add_call_over.png differ
diff --git a/res/drawable-xhdpi/options_start_conference_over.png b/res/drawable-xhdpi/options_start_conference_over.png
index 53049f87d..6a1a8108b 100644
Binary files a/res/drawable-xhdpi/options_start_conference_over.png and b/res/drawable-xhdpi/options_start_conference_over.png differ
diff --git a/res/drawable-xhdpi/options_transfer_call_over.png b/res/drawable-xhdpi/options_transfer_call_over.png
new file mode 100644
index 000000000..89931829b
Binary files /dev/null and b/res/drawable-xhdpi/options_transfer_call_over.png differ
diff --git a/res/layout/call.xml b/res/layout/call.xml
index 4b360610b..7d77406e0 100644
--- a/res/layout/call.xml
+++ b/res/layout/call.xml
@@ -477,8 +477,8 @@
 					android:layout_weight="0.5"
 					android:background="#aeaeae"
 					android:contentDescription="@string/content_description_conference"
-					android:padding="10dp"
-					android:src="@drawable/conference_default"
+					android:padding="5dp"
+					android:src="@drawable/options_start_conference_over"
 					android:visibility="invisible"/>
 
 			</LinearLayout>
diff --git a/src/android/org/linphone/call/CallActivity.java b/src/android/org/linphone/call/CallActivity.java
index 4d7858b17..7d79c6651 100644
--- a/src/android/org/linphone/call/CallActivity.java
+++ b/src/android/org/linphone/call/CallActivity.java
@@ -789,8 +789,10 @@ public class CallActivity extends LinphoneGenericActivity implements OnClickList
 	private void enabledConferenceButton(boolean enabled){
 		if (enabled) {
 			conference.setEnabled(true);
+			conference.setImageAlpha(255);
 		} else {
 			conference.setEnabled(false);
+			conference.setImageAlpha(102);
 		}
 	}