diff --git a/Libraries/StyleSheet/StyleSheet.js b/Libraries/StyleSheet/StyleSheet.js
index 067ae505fda516..8fd9b1f6cd5141 100644
--- a/Libraries/StyleSheet/StyleSheet.js
+++ b/Libraries/StyleSheet/StyleSheet.js
@@ -20,6 +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>;
 
 let hairlineWidth = PixelRatio.roundToNearestPixel(0.4);
 if (hairlineWidth === 0) {