diff --git a/src/apprt/glfw.zig b/src/apprt/glfw.zig
index d2c6fff39..50936eb3a 100644
--- a/src/apprt/glfw.zig
+++ b/src/apprt/glfw.zig
@@ -41,7 +41,7 @@ pub const App = struct {
     pub const Options = struct {};
 
     pub fn init(core_app: *CoreApp, _: Options) !App {
-        _ = internal_os.unsetenv("DISPLAY");
+        internal_os.unsetenv("DISPLAY");
         if (comptime builtin.target.isDarwin()) {
             log.warn("WARNING WARNING WARNING: GLFW ON MAC HAS BUGS.", .{});
             log.warn("You should use the AppKit-based app instead. The official download", .{});