diff --git a/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java b/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java
index 0f7d2f6..d5516ef 100644
--- a/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java
+++ b/java/src/com/android/inputmethod/latin/makedict/BinaryDictIOUtils.java
@@ -460,8 +460,10 @@
                 destination.write((byte)infos.length);
                 break;
             case 2:
-                destination.write((byte)(infos.length >> 8));
-                destination.write((byte)(infos.length & 0xFF));
+                final int encodedPtNodeCount =
+                        infos.length | FormatSpec.LARGE_PTNODE_ARRAY_SIZE_FIELD_SIZE_FLAG;
+                destination.write((byte)(encodedPtNodeCount >> 8));
+                destination.write((byte)(encodedPtNodeCount & 0xFF));
                 break;
             default:
                 throw new RuntimeException("Invalid node count size.");
diff --git a/java/src/com/android/inputmethod/latin/makedict/FormatSpec.java b/java/src/com/android/inputmethod/latin/makedict/FormatSpec.java
index 6d58270..b56234f 100644
--- a/java/src/com/android/inputmethod/latin/makedict/FormatSpec.java
+++ b/java/src/com/android/inputmethod/latin/makedict/FormatSpec.java
@@ -304,6 +304,8 @@
     static final int INVALID_CHARACTER = -1;
 
     static final int MAX_PTNODES_FOR_ONE_BYTE_PTNODE_COUNT = 0x7F; // 127
+    // Large PtNode array size field size is 2 bytes.
+    static final int LARGE_PTNODE_ARRAY_SIZE_FIELD_SIZE_FLAG = 0x8000;
     static final int MAX_PTNODES_IN_A_PT_NODE_ARRAY = 0x7FFF; // 32767
     static final int MAX_BIGRAMS_IN_A_PTNODE = 10000;
     static final int MAX_SHORTCUT_LIST_SIZE_IN_A_PTNODE = 0xFFFF;
diff --git a/java/src/com/android/inputmethod/latin/makedict/Ver3DictEncoder.java b/java/src/com/android/inputmethod/latin/makedict/Ver3DictEncoder.java
index d9e1989..5da3453 100644
--- a/java/src/com/android/inputmethod/latin/makedict/Ver3DictEncoder.java
+++ b/java/src/com/android/inputmethod/latin/makedict/Ver3DictEncoder.java
@@ -129,7 +129,9 @@
         if (countSize != 1 && countSize != 2) {
             throw new RuntimeException("Strange size from getGroupCountSize : " + countSize);
         }
-        mPosition = BinaryDictEncoderUtils.writeUIntToBuffer(mBuffer, mPosition, ptNodeCount,
+        final int encodedPtNodeCount = (countSize == 2) ?
+                (ptNodeCount | FormatSpec.LARGE_PTNODE_ARRAY_SIZE_FIELD_SIZE_FLAG) : ptNodeCount;
+        mPosition = BinaryDictEncoderUtils.writeUIntToBuffer(mBuffer, mPosition, encodedPtNodeCount,
                 countSize);
     }
 
diff --git a/java/src/com/android/inputmethod/latin/makedict/Ver4DictEncoder.java b/java/src/com/android/inputmethod/latin/makedict/Ver4DictEncoder.java
index 5d5ab04..8d5b48a 100644
--- a/java/src/com/android/inputmethod/latin/makedict/Ver4DictEncoder.java
+++ b/java/src/com/android/inputmethod/latin/makedict/Ver4DictEncoder.java
@@ -354,7 +354,9 @@
         if (countSize != 1 && countSize != 2) {
             throw new RuntimeException("Strange size from getPtNodeCountSize : " + countSize);
         }
-        mTriePos = BinaryDictEncoderUtils.writeUIntToBuffer(mTrieBuf, mTriePos, ptNodeCount,
+        final int encodedPtNodeCount = (countSize == 2) ?
+                (ptNodeCount | FormatSpec.LARGE_PTNODE_ARRAY_SIZE_FIELD_SIZE_FLAG) : ptNodeCount;
+        mTriePos = BinaryDictEncoderUtils.writeUIntToBuffer(mTrieBuf, mTriePos, encodedPtNodeCount,
                 countSize);
     }