diff --git a/UI/WebServerResources/scss/core/variables.scss b/UI/WebServerResources/scss/core/variables.scss
index adc89b6c3..0526da2a7 100644
--- a/UI/WebServerResources/scss/core/variables.scss
+++ b/UI/WebServerResources/scss/core/variables.scss
@@ -1,4 +1,11 @@
-/// variables.scss -*- Mode: text; indent-tabs-mode: nil; basic-offset: 2 -*-
+/// variables.scss -*- Mode: scss; indent-tabs-mode: nil; basic-offset: 2 -*-
+
+// Include rem function from angular-material/src/core/style/variables.scss
+// ------------------------------------------------------------------------
+@function rem($multiplier) {
+  $font-size: 10px;
+  @return $multiplier * $font-size;
+}
 
 // Path variables for seamless imports
 // ----------------------------------------------------------------------------