diff --git a/debug/app.ona b/debug/app.ona
index abf72fa..dddd91f 100644
--- a/debug/app.ona
+++ b/debug/app.ona
@@ -1,8 +1,9 @@
 
 var i = 0
 
-let pr = lambda ():
-	@print("foo")
+let pr = lambda (str):
+	@print("This is a func call")
+	@print(str)
 end
 
 while i < 5:
diff --git a/source/ona/kym.zig b/source/ona/kym.zig
index 30b82cc..2a865c8 100644
--- a/source/ona/kym.zig
+++ b/source/ona/kym.zig
@@ -43,6 +43,7 @@ pub const RuntimeEnv = struct {
 			push_false,
 			push_const: u16,
 			push_local: u8,
+			push_arg: u8,
 			push_table: u32,
 			push_builtin: Builtin,
 			local_set: u8,
@@ -71,6 +72,7 @@ pub const RuntimeEnv = struct {
 		const OpcodeList = coral.list.Stack(Opcode);
 
 		const CompilationUnit = struct {
+			args: []const []const coral.io.Byte,
 			locals_buffer: [255]Local = [_]Local{.{}} ** 255,
 			locals_count: u8 = 0,
 
@@ -147,7 +149,7 @@ pub const RuntimeEnv = struct {
 
 						errdefer lambda_chunk.free();
 
-						try lambda_chunk.compile(literal.block_statements.values);
+						try lambda_chunk.compile(literal.block_statements.values, literal.argument_identifiers.values);
 
 						try chunk.opcodes.push_one(.{
 							.push_const = try chunk.declare_constant(.{
@@ -232,11 +234,15 @@ pub const RuntimeEnv = struct {
 					},
 
 					.local_get => |local_get| {
-						try chunk.opcodes.push_one(.{
-							.push_local = (self.resolve_local(local_get.identifier) orelse {
-								return chunk.env.raise(error.OutOfMemory, "undefined local");
-							}).index,
-						});
+						if (self.resolve_local(local_get.identifier)) |local| {
+							return chunk.opcodes.push_one(.{.push_local = local.index});
+						}
+
+						if (self.resolve_arg(local_get.identifier)) |arg| {
+							return chunk.opcodes.push_one(.{.push_arg = arg});
+						}
+
+						return chunk.env.raise(error.OutOfMemory, "undefined local");
 					},
 
 					.local_set => |local_set| {
@@ -367,6 +373,18 @@ pub const RuntimeEnv = struct {
 				}
 			}
 
+			fn resolve_arg(self: *CompilationUnit, arg_identifier: []const coral.io.Byte) ?u8 {
+				var index = @as(u8, 0);
+
+				while (index < self.args.len) {
+					if (coral.io.are_equal(self.args[index], arg_identifier)) {
+						return index;
+					}
+				}
+
+				return null;
+			}
+
 			fn resolve_local(self: *CompilationUnit, local_identifier: []const coral.io.Byte) ?ResolvedLocal {
 				if (self.locals_count == 0) {
 					return null;
@@ -391,8 +409,8 @@ pub const RuntimeEnv = struct {
 			}
 		};
 
-		fn compile(self: *Chunk, statements: []const ast.Statement) RuntimeError!void {
-			var unit = CompilationUnit{};
+		fn compile(self: *Chunk, statements: []const ast.Statement, args: []const []const coral.io.Byte) RuntimeError!void {
+			var unit = CompilationUnit{.args = args};
 			var has_returned = false;
 
 			for (statements) |statement| {
@@ -468,6 +486,18 @@ pub const RuntimeEnv = struct {
 						}
 					},
 
+					.push_arg => |push_arg| {
+						const arg = try self.env.acquire_arg(push_arg);
+
+						errdefer {
+							if (arg) |ref| {
+								self.env.discard(ref);
+							}
+						}
+
+						try self.env.locals.push_one(arg);
+					},
+
 					.push_table => |push_table| {
 						const table = try self.env.new_table();
 
@@ -1203,7 +1233,7 @@ pub const RuntimeEnv = struct {
 		try chunk.compile(ast_tree.parse(file_data) catch |parse_error| return switch (parse_error) {
 			error.BadSyntax => self.raise(error.BadSyntax, ast_tree.error_message()),
 			error.OutOfMemory => error.OutOfMemory,
-		});
+		}, &.{});
 
 		try self.frames.push_one(.{
 			.name = file_name,