diff --git a/java/src/com/android/inputmethod/latin/DictionaryFacilitator.java b/java/src/com/android/inputmethod/latin/DictionaryFacilitator.java
index 8a700d564..7e916003b 100644
--- a/java/src/com/android/inputmethod/latin/DictionaryFacilitator.java
+++ b/java/src/com/android/inputmethod/latin/DictionaryFacilitator.java
@@ -156,7 +156,7 @@ public interface DictionaryFacilitator {
             final int eventType);
 
     // TODO: Revise the way to fusion suggestion results.
-    SuggestionResults getSuggestionResults(final ComposedData composedData,
+    @Nonnull SuggestionResults getSuggestionResults(final ComposedData composedData,
             final NgramContext ngramContext, @Nonnull final Keyboard keyboard,
             final SettingsValuesForSuggestion settingsValuesForSuggestion, final int sessionId,
             final int inputStyle);
diff --git a/java/src/com/android/inputmethod/latin/DictionaryFacilitatorImpl.java b/java/src/com/android/inputmethod/latin/DictionaryFacilitatorImpl.java
index 05eec9d61..7ad2a9f7d 100644
--- a/java/src/com/android/inputmethod/latin/DictionaryFacilitatorImpl.java
+++ b/java/src/com/android/inputmethod/latin/DictionaryFacilitatorImpl.java
@@ -667,7 +667,7 @@ public class DictionaryFacilitatorImpl implements DictionaryFacilitator {
 
     // TODO: Revise the way to fusion suggestion results.
     @Override
-    public SuggestionResults getSuggestionResults(ComposedData composedData,
+    @Nonnull public SuggestionResults getSuggestionResults(ComposedData composedData,
             NgramContext ngramContext, @Nonnull final Keyboard keyboard,
             SettingsValuesForSuggestion settingsValuesForSuggestion, int sessionId,
             int inputStyle) {