diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardSet.java b/java/src/com/android/inputmethod/keyboard/KeyboardSet.java
index cacb8a3..ae5e4e8 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardSet.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardSet.java
@@ -244,9 +244,10 @@
         // TODO: Use InputMethodSubtype object as argument.
         public Builder setSubtype(Locale inputLocale, boolean asciiCapable,
                 boolean touchPositionCorrectionEnabled) {
+            final boolean deprecatedForceAscii = Utils.inPrivateImeOptions(
+                    mPackageName, LatinIME.IME_OPTION_FORCE_ASCII, mEditorInfo);
             final boolean forceAscii = EditorInfoCompatUtils.hasFlagForceAscii(mParams.mImeOptions)
-                    || Utils.inPrivateImeOptions(
-                            mPackageName, LatinIME.IME_OPTION_FORCE_ASCII, mEditorInfo);
+                    || deprecatedForceAscii;
             mParams.mLocale = (forceAscii && !asciiCapable) ? Locale.US : inputLocale;
             mParams.mTouchPositionCorrectionEnabled = touchPositionCorrectionEnabled;
             return this;
@@ -256,10 +257,11 @@
                 boolean voiceKeyOnMain) {
             mParams.mSettingsKeyEnabled = settingsKeyEnabled;
             @SuppressWarnings("deprecation")
+            final boolean deprecatedNoMicrophone = Utils.inPrivateImeOptions(
+                    null, LatinIME.IME_OPTION_NO_MICROPHONE_COMPAT, mEditorInfo);
             final boolean noMicrophone = Utils.inPrivateImeOptions(
                     mPackageName, LatinIME.IME_OPTION_NO_MICROPHONE, mEditorInfo)
-                    || Utils.inPrivateImeOptions(
-                            null, LatinIME.IME_OPTION_NO_MICROPHONE_COMPAT, mEditorInfo);
+                    || deprecatedNoMicrophone;
             mParams.mVoiceKeyEnabled = voiceKeyEnabled && !noMicrophone;
             mParams.mVoiceKeyOnMain = voiceKeyOnMain;
             return this;
diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index 327950a..f2fa788 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -104,7 +104,6 @@
      */
     public static final String IME_OPTION_NO_SETTINGS_KEY = "noSettingsKey";
 
-    // TODO: Remove this private option.
     /**
      * The private IME option used to indicate that the given text field needs
      * ASCII code points input.
@@ -729,6 +728,17 @@
                     : String.format("inputType=0x%08x imeOptions=0x%08x",
                             editorInfo.inputType, editorInfo.imeOptions)));
         }
+        if (Utils.inPrivateImeOptions(null, IME_OPTION_NO_MICROPHONE_COMPAT, editorInfo)) {
+            Log.w(TAG, "Deprecated private IME option specified: "
+                    + editorInfo.privateImeOptions);
+            Log.w(TAG, "Use " + getPackageName() + "." + IME_OPTION_NO_MICROPHONE + " instead");
+        }
+        if (Utils.inPrivateImeOptions(getPackageName(), IME_OPTION_FORCE_ASCII, editorInfo)) {
+            Log.w(TAG, "Deprecated private IME option specified: "
+                    + editorInfo.privateImeOptions);
+            Log.w(TAG, "Use EditorInfo.IME_FLAG_FORCE_ASCII flag instead");
+        }
+
         LatinImeLogger.onStartInputView(editorInfo);
         // In landscape mode, this method gets called without the input view being created.
         if (inputView == null) {