diff --git a/scss/_rotated-flipped.scss b/scss/_rotated-flipped.scss
index f27fabee4..8d8819b4e 100644
--- a/scss/_rotated-flipped.scss
+++ b/scss/_rotated-flipped.scss
@@ -27,5 +27,5 @@
 }
 
 .#{$fa-css-prefix}-rotate-by {
-  transform: rotate(var(--#{$fa-css-prefix}-rotate-angle, none));
+  transform: rotate(var(--#{$fa-css-prefix}-rotate-angle, 0deg));
 }