diff --git a/x.c b/x.c
index 4a80509..d9fa7bc 100644
--- a/x.c
+++ b/x.c
@@ -220,7 +220,7 @@ static dimension_t calculate_dimensions(GSList *layouts)
 
                         if (total_width > scr.dim.w) {
                                 /* set width to screen width */
-                                dim.w = scr.dim.w - xctx.geometry.y * 2;
+                                dim.w = scr.dim.w - xctx.geometry.x * 2;
                         } else if (total_width < xctx.geometry.w && settings.shrink) {
                                 /* set width to text width */
                                 dim.w = total_width + 2 * settings.frame_width;