diff --git a/hello b/hello
index 4825f68..a4b5094 100755
Binary files a/hello and b/hello differ
diff --git a/src/codegen.zig b/src/codegen.zig
index 38eafdd..e71517e 100644
--- a/src/codegen.zig
+++ b/src/codegen.zig
@@ -449,8 +449,11 @@ pub const Codegen = struct {
                     std.debug.warn("SET PARAM LLVM ALLOCA {} to {}\n", param_node.name.lexeme, alloca);
                     param.llvm_alloca = alloca;
 
-                    // TODO store register into stack param
-                    // llvm.LLVMBuildStore(builder, null, assign_expr);
+                    _ = llvm.LLVMBuildStore(
+                        builder,
+                        llvm.LLVMGetParam(func, @intCast(c_uint, idx)),
+                        alloca,
+                    );
                 }
 
                 self.ctx.setScope(fn_sym.scope);