diff --git a/java/src/com/android/inputmethod/latin/BinaryDictionary.java b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
index b7b08cd97..d9bad7e57 100644
--- a/java/src/com/android/inputmethod/latin/BinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
@@ -270,18 +270,11 @@ public final class BinaryDictionary extends Dictionary {
         return getBigramProbabilityNative(mNativeDict, codePoints0, codePoints1);
     }
 
-    private void runGCIfRequired() {
-        if (needsToRunGC(true /* mindsBlockByGC */)) {
-            flushWithGC();
-        }
-    }
-
     // Add a unigram entry to binary dictionary in native code.
     public void addUnigramWord(final String word, final int probability) {
         if (TextUtils.isEmpty(word)) {
             return;
         }
-        runGCIfRequired();
         final int[] codePoints = StringUtils.toCodePointArray(word);
         addUnigramWordNative(mNativeDict, codePoints, probability);
     }
@@ -291,7 +284,6 @@ public final class BinaryDictionary extends Dictionary {
         if (TextUtils.isEmpty(word0) || TextUtils.isEmpty(word1)) {
             return;
         }
-        runGCIfRequired();
         final int[] codePoints0 = StringUtils.toCodePointArray(word0);
         final int[] codePoints1 = StringUtils.toCodePointArray(word1);
         addBigramWordsNative(mNativeDict, codePoints0, codePoints1, probability);
@@ -302,7 +294,6 @@ public final class BinaryDictionary extends Dictionary {
         if (TextUtils.isEmpty(word0) || TextUtils.isEmpty(word1)) {
             return;
         }
-        runGCIfRequired();
         final int[] codePoints0 = StringUtils.toCodePointArray(word0);
         final int[] codePoints1 = StringUtils.toCodePointArray(word1);
         removeBigramWordsNative(mNativeDict, codePoints0, codePoints1);
diff --git a/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java b/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
index 2d1ca51e2..306c1a253 100644
--- a/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/ExpandableBinaryDictionary.java
@@ -273,6 +273,24 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
                 lastModifiedTime);
     }
 
+    private void runGCIfRequired() {
+        if (!ENABLE_BINARY_DICTIONARY_DYNAMIC_UPDATE) return;
+        if (mBinaryDictionary.needsToRunGC(true /* mindsBlockByGC */)) {
+            if (setIsRegeneratingIfNotRegenerating()) {
+                getExecutor(mFilename).execute(new Runnable() {
+                    @Override
+                    public void run() {
+                        try {
+                            mBinaryDictionary.flushWithGC();
+                        } finally {
+                            mFilenameDictionaryUpdateController.mIsRegenerating.set(false);
+                        }
+                    }
+                });
+            }
+        }
+    }
+
     /**
      * Dynamically adds a word unigram to the dictionary. May overwrite an existing entry.
      */
@@ -282,7 +300,7 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
             Log.w(TAG, "addWordDynamically is called for non-updatable dictionary: " + mFilename);
             return;
         }
-
+        runGCIfRequired();
         getExecutor(mFilename).execute(new Runnable() {
             @Override
             public void run() {
@@ -306,7 +324,7 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
                     + mFilename);
             return;
         }
-
+        runGCIfRequired();
         getExecutor(mFilename).execute(new Runnable() {
             @Override
             public void run() {
@@ -330,7 +348,7 @@ abstract public class ExpandableBinaryDictionary extends Dictionary {
                     + mFilename);
             return;
         }
-
+        runGCIfRequired();
         getExecutor(mFilename).execute(new Runnable() {
             @Override
             public void run() {