diff --git a/src/idl_gen_js.cpp b/src/idl_gen_js.cpp
index d46f41179..0e95830d9 100644
--- a/src/idl_gen_js.cpp
+++ b/src/idl_gen_js.cpp
@@ -579,8 +579,11 @@ static void GenStruct(const Parser &parser, StructDef &struct_def,
           code += "  builder.startVector(" + NumToString(elem_size);
           code += ", data.length, " + NumToString(alignment) + ");\n";
           code += "  for (var i = data.length - 1; i >= 0; i--) {\n";
-          code += "    builder.add" + GenWriteMethod(vector_type);
-          code += "(data[i]);\n";
+          code += "    builder.add" + GenWriteMethod(vector_type) + "(";
+          if (vector_type.base_type == BASE_TYPE_BOOL) {
+            code += "+";
+          }
+          code += "data[i]);\n";
           code += "  }\n";
           code += "  return builder.endVector();\n";
           code += "};\n\n";
diff --git a/tests/monster_test.bfbs b/tests/monster_test.bfbs
index e5f51face..8d54ead7e 100644
Binary files a/tests/monster_test.bfbs and b/tests/monster_test.bfbs differ
diff --git a/tests/monster_test_generated.js b/tests/monster_test_generated.js
index 39cd3d2e8..5687308e8 100644
--- a/tests/monster_test_generated.js
+++ b/tests/monster_test_generated.js
@@ -631,11 +631,28 @@ MyGame.Example.Monster.prototype.testhashu64Fnv1a = function() {
   return offset ? this.bb.readUint64(this.bb_pos + offset) : flatbuffers.Long.ZERO;
 };
 
+/**
+ * @param {number} index
+ * @returns {boolean}
+ */
+MyGame.Example.Monster.prototype.testarrayofbools = function(index) {
+  var offset = this.bb.__offset(this.bb_pos, 52);
+  return offset ? !!this.bb.readInt8(this.bb.__vector(this.bb_pos + offset) + index) : false;
+};
+
+/**
+ * @returns {number}
+ */
+MyGame.Example.Monster.prototype.testarrayofboolsLength = function() {
+  var offset = this.bb.__offset(this.bb_pos, 52);
+  return offset ? this.bb.__vector_len(this.bb_pos + offset) : 0;
+};
+
 /**
  * @param {flatbuffers.Builder} builder
  */
 MyGame.Example.Monster.startMonster = function(builder) {
-  builder.startObject(24);
+  builder.startObject(25);
 };
 
 /**
@@ -914,6 +931,35 @@ MyGame.Example.Monster.addTesthashu64Fnv1a = function(builder, testhashu64Fnv1a)
   builder.addFieldInt64(23, testhashu64Fnv1a, flatbuffers.Long.ZERO);
 };
 
+/**
+ * @param {flatbuffers.Builder} builder
+ * @param {flatbuffers.Offset} testarrayofboolsOffset
+ */
+MyGame.Example.Monster.addTestarrayofbools = function(builder, testarrayofboolsOffset) {
+  builder.addFieldOffset(24, testarrayofboolsOffset, 0);
+};
+
+/**
+ * @param {flatbuffers.Builder} builder
+ * @param {Array.<boolean>} data
+ * @returns {flatbuffers.Offset}
+ */
+MyGame.Example.Monster.createTestarrayofboolsVector = function(builder, data) {
+  builder.startVector(1, data.length, 1);
+  for (var i = data.length - 1; i >= 0; i--) {
+    builder.addInt8(+data[i]);
+  }
+  return builder.endVector();
+};
+
+/**
+ * @param {flatbuffers.Builder} builder
+ * @param {number} numElems
+ */
+MyGame.Example.Monster.startTestarrayofboolsVector = function(builder, numElems) {
+  builder.startVector(1, numElems, 1);
+};
+
 /**
  * @param {flatbuffers.Builder} builder
  * @returns {flatbuffers.Offset}