diff --git a/Libraries/StyleSheet/StyleSheet.js b/Libraries/StyleSheet/StyleSheet.js
index 8fd9b1f6c..411cad91b 100644
--- a/Libraries/StyleSheet/StyleSheet.js
+++ b/Libraries/StyleSheet/StyleSheet.js
@@ -20,8 +20,8 @@ const flatten = require('flattenStyle');
 
 export type Styles = {[key: string]: Object};
 export type StyleSheet<S: Styles> = {[key: $Keys<S>]: number};
-export type StyleValue = {[key: string]: Object} | number | false | null;
-export type StyleProp = StyleValue | Array<StyleValue>;
+export type StyleValue = Object | number | false | null | void | '';
+export type StyleProp = StyleValue | Array<StyleProp>;
 
 let hairlineWidth = PixelRatio.roundToNearestPixel(0.4);
 if (hairlineWidth === 0) {