diff --git a/types/react/index.d.ts b/types/react/index.d.ts
index 77356b922b..b2dc6057cc 100644
--- a/types/react/index.d.ts
+++ b/types/react/index.d.ts
@@ -926,6 +926,11 @@ declare namespace React {
          */
         backgroundRepeat?: CSSWideKeyword | any;
 
+        /**
+         * Defines the size of the background images
+         */
+        backgroundSize?: CSSWideKeyword | any;
+
         /**
          * Obsolete - spec retired, not implemented.
          */