diff --git a/packages/core/src/sanitization/sanitization.ts b/packages/core/src/sanitization/sanitization.ts
index 5e03458356..6a0b6d17b8 100644
--- a/packages/core/src/sanitization/sanitization.ts
+++ b/packages/core/src/sanitization/sanitization.ts
@@ -139,8 +139,7 @@ export function sanitizeScript(unsafeScript: any): string {
 export const defaultStyleSanitizer = (function(prop: string, value?: string): string | boolean {
   if (value === undefined) {
     return prop === 'background-image' || prop === 'background' || prop === 'border-image' ||
-        prop === 'filter' || prop === 'filter' || prop === 'list-style' ||
-        prop === 'list-style-image';
+        prop === 'filter' || prop === 'list-style' || prop === 'list-style-image';
   }
 
   return sanitizeStyle(value);
@@ -149,4 +148,4 @@ export const defaultStyleSanitizer = (function(prop: string, value?: string): st
 function getSanitizer(): Sanitizer|null {
   const lView = getLView();
   return lView && lView[SANITIZER];
-}
\ No newline at end of file
+}