diff --git a/src/styleRe.re b/src/styleRe.re
index 1bd44d83ab0437..42b86cd1270299 100644
--- a/src/styleRe.re
+++ b/src/styleRe.re
@@ -1,5 +1,7 @@
 type t;
 
+external flatten : array t => t = "%identity";
+
 external to_style : Js.Dict.t Js.Json.t => t = "%identity";
 
 external style_to_dict : t => Js.Dict.t Js.Json.t = "%identity";
diff --git a/src/styleRe.rei b/src/styleRe.rei
index 3a1b839fa2925f..6642a4c2c01e16 100644
--- a/src/styleRe.rei
+++ b/src/styleRe.rei
@@ -1,5 +1,14 @@
 type t;
 
+/** Generates a style out of an array of styles.
+ * This is equivalent:
+ * // js
+ * <View style={[styleA, styleB]} />
+ * // reason
+ * <View style=(Style.flatten [|styleA, styleB|]) />
+*/
+let flatten: array t => t;
+
 type style;
 
 let style: list style => t;
@@ -9,8 +18,6 @@ let combine: t => t => t;
 let concat: list t => t;
 
 
-/** Equivalent to [style_a, style_b] in js */
-
 /**
  * Layout Props
  */