diff --git a/less/01-base.less b/less/01-base.less
index 3fe697b..4873058 100644
--- a/less/01-base.less
+++ b/less/01-base.less
@@ -106,7 +106,7 @@ h6, .h6-like {
 	.em(@base-font-size - 2);
 }
 .big {
-	.em(@base-font-sizef + 2);
+	.em(@base-font-size + 2);
 }
 .bigger {
 	.em(@base-font-size + 4);