diff --git a/lib/rb/spec/ThriftSpec.thrift b/lib/rb/spec/ThriftSpec.thrift
index 84111c1..b497a60 100644
--- a/lib/rb/spec/ThriftSpec.thrift
+++ b/lib/rb/spec/ThriftSpec.thrift
@@ -69,6 +69,7 @@
   5: map<i32, map<string, double>> complex,
   6: set<i16> shorts = [5, 17, 239],
   7: optional string opt_string
+  8: bool my_bool
 }
 
 struct BoolStruct {
diff --git a/lib/rb/spec/struct_spec.rb b/lib/rb/spec/struct_spec.rb
index 045b963..4b46284 100644
--- a/lib/rb/spec/struct_spec.rb
+++ b/lib/rb/spec/struct_spec.rb
@@ -68,6 +68,13 @@
       StructWithEnumMap.new(:my_map => {SomeEnum::ONE => [SomeEnum::TWO]}).inspect.should == "<SpecNamespace::StructWithEnumMap my_map:{ONE (0): [TWO (1)]}>"
     end
 
+    it "should offer field? methods" do
+      Foo.new.opt_string?.should be_false
+      Foo.new(:simple => 52).simple?.should be_true
+      Foo.new(:my_bool => false).my_bool?.should be_true
+      Foo.new(:my_bool => true).my_bool?.should be_true
+    end
+
     it "should read itself off the wire" do
       struct = Foo.new
       prot = BaseProtocol.new(mock("transport"))
diff --git a/lib/rb/spec/union_spec.rb b/lib/rb/spec/union_spec.rb
index f39d033..f563b0b 100644
--- a/lib/rb/spec/union_spec.rb
+++ b/lib/rb/spec/union_spec.rb
@@ -153,5 +153,12 @@
       
       My_union.new(:my_map => {SomeEnum::ONE => [SomeEnum::TWO]}).inspect.should == "<SpecNamespace::My_union my_map: {ONE (0): [TWO (1)]}>" 
     end
+    
+    it "should offer field? methods" do
+      My_union.new.some_enum?.should be_false
+      My_union.new(:some_enum => SomeEnum::ONE).some_enum?.should be_true
+      My_union.new(:im_true => false).im_true?.should be_true
+      My_union.new(:im_true => true).im_true?.should be_true
+    end
   end
 end