diff --git a/proguard-release.flags b/proguard-release.flags
new file mode 100644
index 0000000..36b6720
--- /dev/null
+++ b/proguard-release.flags
@@ -0,0 +1,24 @@
+#  Copyright (C) 2015 The Android Open Source Project
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+-assumenosideeffects public class com.android.messaging.util.Trace {
+    public void beginSection(...);
+    public void endSection(...);
+}
+-assumenosideeffects public class com.android.messaging.util.Assert {
+    private void setIfEngBuild();
+}
+-assumenosideeffects public class com.android.messaging.util.DebugUtils {
+    public void logCurrentMethod(...);
+}