diff --git a/src/renderers/dom/shared/CSSProperty.js b/src/renderers/dom/shared/CSSProperty.js
index 16c23c0135971..c398ff6435e75 100644
--- a/src/renderers/dom/shared/CSSProperty.js
+++ b/src/renderers/dom/shared/CSSProperty.js
@@ -16,6 +16,7 @@
  */
 var isUnitlessNumber = {
   animationIterationCount: true,
+  borderImageOutset: true,
   boxFlex: true,
   boxFlexGroup: true,
   boxOrdinalGroup: true,