diff --git a/configuration.nix b/configuration.nix
index e6c6742..d66d47d 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -723,7 +723,7 @@ valign = bottom
 		       	border: ${BORDER_WIDTH}px solid RGBA(235, 219, 178, 1);
 			background-color: transparent;
 			box-shadow: 0px 0px 0px 60px black, 0px 0px 0px 0.5px #ebdbb2;
-			border-radius: "${CORNER_RADIUS_INT + BORDER_WIDTH_INT}"px;
+			border-radius: ${builtins.toString CORNER_RADIUS_INT + BORDER_WIDTH_INT}px;
 			margin: 20px;
 		      }
 		      window#waybar.right,