diff --git a/tests/bar/1.0/IBar.hal b/tests/bar/1.0/IBar.hal
index 82c6fc1..21c3473 100644
--- a/tests/bar/1.0/IBar.hal
+++ b/tests/bar/1.0/IBar.hal
@@ -31,4 +31,6 @@
 
     thisIsNew();
     expectNullHandle(handle h, Abc xyz) generates (bool hIsNull, bool xyzHasNull);
+    takeAMask(BitField bf, bitfield<BitField> first, MyMask second, Mask third)
+            generates (BitField bf, uint8_t first, uint8_t second, uint8_t third);
 };
diff --git a/tests/bar/1.0/default/Bar.cpp b/tests/bar/1.0/default/Bar.cpp
index cac0845..a9b6c25 100644
--- a/tests/bar/1.0/default/Bar.cpp
+++ b/tests/bar/1.0/default/Bar.cpp
@@ -185,6 +185,12 @@
     return Void();
 }
 
+Return<void> Bar::takeAMask(BitField bf, uint8_t first, const MyMask& second, uint8_t third,
+            takeAMask_cb _hidl_cb) {
+    _hidl_cb(bf, bf | first, second.value & bf, (bf | bf) & third);
+    return Void();
+}
+
 IBar* HIDL_FETCH_IBar(const char* /* name */) {
     return new Bar();
 }
diff --git a/tests/bar/1.0/default/Bar.h b/tests/bar/1.0/default/Bar.h
index 0400b98..71737fe 100644
--- a/tests/bar/1.0/default/Bar.h
+++ b/tests/bar/1.0/default/Bar.h
@@ -23,6 +23,9 @@
 using ::android::hardware::hidl_string;
 using ::android::sp;
 
+using BitField = ::android::hardware::tests::foo::V1_0::IFoo::BitField;
+using MyMask = ::android::hardware::tests::foo::V1_0::IFoo::MyMask;
+
 struct Bar : public IBar {
 
     Bar();
@@ -66,6 +69,9 @@
     Return<void> thisIsNew()  override;
     Return<void> expectNullHandle(const hidl_handle& h, const Abc& xyz, expectNullHandle_cb _hidl_cb)  override;
 
+    Return<void> takeAMask(BitField bf, uint8_t first, const MyMask& second, uint8_t third,
+            takeAMask_cb _hidl_cb) override;
+
 private:
     sp<IFoo> mFoo;
 };