diff --git a/src/container.zig b/src/container.zig
index a024096..e33e464 100644
--- a/src/container.zig
+++ b/src/container.zig
@@ -48,37 +48,41 @@ pub const Border = packed struct {
         std.debug.assert(frame.len == 6);
 
         // render top and bottom border
-        for (0..size.cols) |col| {
-            const last_row = @as(usize, size.rows - 1) * @as(usize, size.cols);
-            if (this.sides.left and col == 0) {
-                // top left corner
-                if (this.sides.top) cells[col].cp = frame[0];
-                // bottom left corner
-                if (this.sides.bottom) cells[last_row + col].cp = frame[4];
-            } else if (this.sides.right and col == size.cols - 1) {
-                // top right corner
-                if (this.sides.top) cells[col].cp = frame[2];
-                // bottom left corner
-                if (this.sides.bottom) cells[last_row + col].cp = frame[5];
-            } else {
-                // top side
-                if (this.sides.top) cells[col].cp = frame[1];
-                // bottom side
-                if (this.sides.bottom) cells[last_row + col].cp = frame[1];
+        if (this.sides.top or this.sides.bottom) {
+            for (0..size.cols) |col| {
+                const last_row = @as(usize, size.rows - 1) * @as(usize, size.cols);
+                if (this.sides.left and col == 0) {
+                    // top left corner
+                    if (this.sides.top) cells[col].cp = frame[0];
+                    // bottom left corner
+                    if (this.sides.bottom) cells[last_row + col].cp = frame[4];
+                } else if (this.sides.right and col == size.cols - 1) {
+                    // top right corner
+                    if (this.sides.top) cells[col].cp = frame[2];
+                    // bottom left corner
+                    if (this.sides.bottom) cells[last_row + col].cp = frame[5];
+                } else {
+                    // top side
+                    if (this.sides.top) cells[col].cp = frame[1];
+                    // bottom side
+                    if (this.sides.bottom) cells[last_row + col].cp = frame[1];
+                }
+                if (this.sides.top) cells[col].style.fg = this.color;
+                if (this.sides.bottom) cells[last_row + col].style.fg = this.color;
             }
-            if (this.sides.top) cells[col].style.fg = this.color;
-            if (this.sides.bottom) cells[last_row + col].style.fg = this.color;
         }
         // render left and right border
-        for (1..size.rows -| 1) |row| {
-            const idx = (row * size.cols);
-            if (this.sides.left) {
-                cells[idx].cp = frame[3]; // left
-                cells[idx].style.fg = this.color;
-            }
-            if (this.sides.right) {
-                cells[idx + size.cols - 1].cp = frame[3]; // right
-                cells[idx + size.cols - 1].style.fg = this.color;
+        if (this.sides.left or this.sides.right) {
+            for (1..size.rows -| 1) |row| {
+                const idx = (row * size.cols);
+                if (this.sides.left) {
+                    cells[idx].cp = frame[3]; // left
+                    cells[idx].style.fg = this.color;
+                }
+                if (this.sides.right) {
+                    cells[idx + size.cols - 1].cp = frame[3]; // right
+                    cells[idx + size.cols - 1].style.fg = this.color;
+                }
             }
         }
     }