diff --git a/src/runner/instance.rs b/src/runner/instance.rs
index 093897c..e52caf2 100644
--- a/src/runner/instance.rs
+++ b/src/runner/instance.rs
@@ -32,6 +32,9 @@ fn get_full_name(dom:&rbx_dom_weak::WeakDom,instance:&rbx_dom_weak::Instance)->S
 pub fn find_first_child_of_class<'a>(dom:&'a rbx_dom_weak::WeakDom,instance:&rbx_dom_weak::Instance,class:&str)->Option<&'a rbx_dom_weak::Instance>{
 	instance.children().iter().filter_map(|&r|dom.get_by_ref(r)).find(|inst|inst.class==class)
 }
+pub fn find_first_descendant_of_class<'a>(dom:&'a rbx_dom_weak::WeakDom,instance:&rbx_dom_weak::Instance,class:&str)->Option<&'a rbx_dom_weak::Instance>{
+	dom.descendants_of(instance.referent()).find(|&inst|inst.class==class)
+}
 
 //workaround until I have an enum of classes
 struct Dereferent(Ref);
@@ -162,17 +165,12 @@ impl Instance{
 				Ok(children)
 			})
 		);
-		let ffc=|lua,this:&T,(name,search_descendants):(mlua::String,mlua::Value)|{
+		let ffc=|lua,this:&T,(name,search_descendants):(mlua::String,Option<bool>)|{
 			let name_str=name.to_str()?;
-			let search_descendants=match search_descendants{
-				mlua::Value::Nil=>false,
-				mlua::Value::Boolean(b)=>b,
-				_=>Err(mlua::Error::runtime("Invalid argument #3 bool expected"))?,
-			};
 			dom(lua,|dom|{
 				let instance=this.get(dom)?;
 				Ok(
-					match search_descendants{
+					match search_descendants.unwrap_or(false){
 						true=>dom.descendants_of(this.referent()).find(|inst|inst.name==name_str),
 						false=>instance.children().iter().filter_map(|&r|
 							dom.get_by_ref(r)
@@ -186,19 +184,15 @@ impl Instance{
 		};
 		methods.add_method("FindFirstChild",ffc);
 		methods.add_method("WaitForChild",ffc);
-		methods.add_method("FindFirstChildOfClass",|lua,this,(class,search_descendants):(mlua::String,mlua::Value)|{
+		methods.add_method("FindFirstChildOfClass",|lua,this,(class,search_descendants):(mlua::String,Option<bool>)|{
 			let class_str=class.to_str()?;
-			let search_descendants=match search_descendants{
-				mlua::Value::Nil=>false,
-				mlua::Value::Boolean(b)=>b,
-				_=>Err(mlua::Error::runtime("Invalid argument #3 bool expected"))?,
-			};
-			if search_descendants==true{
-				return Err(mlua::Error::runtime("FFC of class searching descendants not supported get rekt"));
-			}
 			dom(lua,|dom|{
-				Ok(find_first_child_of_class(dom,this.get(dom)?,class_str)
-        			.map(|inst|(Instance::new(inst.referent())))
+				Ok(
+					match search_descendants.unwrap_or(false){
+						true=>find_first_descendant_of_class(dom,this.get(dom)?,class_str),
+						false=>find_first_child_of_class(dom,this.get(dom)?,class_str),
+					}
+					.map(|inst|(Instance::new(inst.referent())))
 				)
 			})
 		});