diff --git a/_knife.sass b/_knife.sass
index 4e5352a..f2016ca 100644
--- a/_knife.sass
+++ b/_knife.sass
@@ -168,10 +168,10 @@ $outputrems: 		true !default
 	//lineheightmod to replace push and pull with a single value, easy declare eg. to bump up lineheight by one whole line (2 half lines) for an element ktype(0,1,1,2)
 	@if $lineheightmod < 0
 		$m: ($lineheightmod / 2)
-		$new-line-height: $new-line-height - ($new-line-height*$m)
+		$new-line-height: $new-line-height + ($kb*$m)
 	@else if $lineheightmod > 0
 		$m: ($lineheightmod / 2)
-		$new-line-height: $new-line-height + ($new-line-height*$m)
+		$new-line-height: $new-line-height + ($kb*$m)
 	
 	// offset
 	@if $offset != 0
diff --git a/_knife.scss b/_knife.scss
index 8bf2bc3..3d1253c 100644
--- a/_knife.scss
+++ b/_knife.scss
@@ -194,10 +194,10 @@ $outputrems: 		true !default;
 	//lineheightmod to replace push and pull with a single value, easy declare eg. to bump up lineheight by one whole line (2 half lines) for an element ktype(0,1,1,2)
 	@if ($lineheightmod < 0) {
 		$m: ($lineheightmod / 2);
-		$new-line-height: $new-line-height - ($new-line-height*$m);
+		$new-line-height: $new-line-height + ($kb*$m);
 	} @else if ($lineheightmod > 0) {
 		$m: ($lineheightmod / 2);
-		$new-line-height: $new-line-height + ($new-line-height*$m);
+		$new-line-height: $new-line-height + ($kb*$m);
 	}
 
 	// offset