diff --git a/ruby_data.h b/ruby_data.h
index 8ccdd55..b450b82 100644
--- a/ruby_data.h
+++ b/ruby_data.h
@@ -45,11 +45,11 @@ class RubyDest {
   }
 
   VALUE pushDouble(double value, const char* name=0) {
-    return Qnil;
+    return rb_float_new(value);
   }
 
   VALUE pushBool(bool value, const char* name=0) {
-    return Qnil;
+    return value ? Qtrue : Qfalse;
   }
 
   VALUE pushNull(const char* name=0) {
diff --git a/spec/therubyracer_spec.rb b/spec/therubyracer_spec.rb
index 5ff7c25..74cc196 100644
--- a/spec/therubyracer_spec.rb
+++ b/spec/therubyracer_spec.rb
@@ -8,6 +8,15 @@ describe "The Ruby Racer" do
   
   describe  "Type Conversion from Ruby to Javascript" do
     
+    it "can pass nil back to ruby" do
+      eval("null").should be_nil      
+    end
+    
+    it "passes back undefined value as nil" do
+      pending "This currently causes a segmentation fault..."
+      eval("this.undefined").should be_nil
+    end
+    
     it "can pass strings back to ruby" do
       eval("'Hello World'").should == "Hello World"
     end