diff --git a/packages/flowtip-core/src/flowtip.js b/packages/flowtip-core/src/flowtip.js
index 93f7913..b3dfee9 100644
--- a/packages/flowtip-core/src/flowtip.js
+++ b/packages/flowtip-core/src/flowtip.js
@@ -810,6 +810,10 @@ const allRegions = {top: true, right: true, bottom: true, left: true};
 const noRegions = {top: false, right: false, bottom: false, left: false};
 
 function normalizeAlign(align: ?Align): number {
+  if (typeof align === 'number') {
+    return align;
+  }
+
   if (align === 'start') {
     return 0;
   }