diff --git a/source/zxing/zxing/common/BitArray.cpp b/source/zxing/zxing/common/BitArray.cpp
index 0cde919..452f474 100644
--- a/source/zxing/zxing/common/BitArray.cpp
+++ b/source/zxing/zxing/common/BitArray.cpp
@@ -179,6 +179,15 @@ void BitArray::appendBits(int value, int numBits)
     }
 }
 
+void BitArray::appendBitArray(const BitArray& other)
+{
+    int otherSize = other.size;
+    ensureCapacity(size + otherSize);
+    for (int i = 0; i < otherSize; i++) {
+        appendBit(other.get(i));
+    }
+}
+
 void BitArray::ensureCapacity(int size)
 {
     if (size > bits->size() * 32)
diff --git a/source/zxing/zxing/common/BitArray.h b/source/zxing/zxing/common/BitArray.h
index bd25c24..6b6b623 100644
--- a/source/zxing/zxing/common/BitArray.h
+++ b/source/zxing/zxing/common/BitArray.h
@@ -64,6 +64,7 @@ public:
 
     void appendBit(bool bit);
     void appendBits(int value, int numBits);
+    void appendBitArray(const BitArray& other);
     void ensureCapacity(int size);
 
     void xor_(const BitArray& other);