diff --git a/src/Surface.zig b/src/Surface.zig
index d15e56cf1..449a506a9 100644
--- a/src/Surface.zig
+++ b/src/Surface.zig
@@ -1193,11 +1193,14 @@ pub fn scrollCallback(
 }
 
 pub fn contentScaleCallback(self: *Surface, content_scale: apprt.ContentScale) void {
-    var size = self.font_size;
     const x_dpi = content_scale.x * font.face.default_dpi;
     const y_dpi = content_scale.y * font.face.default_dpi;
-    size.xdpi = @intFromFloat(x_dpi);
-    size.ydpi = @intFromFloat(y_dpi);
+    const size = size: {
+        var size = self.font_size;
+        size.xdpi = @intFromFloat(x_dpi);
+        size.ydpi = @intFromFloat(y_dpi);
+        break :size size;
+    };
     self.setFontSize(size);
 }