diff --git a/core/src/utils/platform.ts b/core/src/utils/platform.ts
index 977acb1707..d2c19f7ec0 100644
--- a/core/src/utils/platform.ts
+++ b/core/src/utils/platform.ts
@@ -18,7 +18,7 @@ export const PLATFORMS_MAP = {
 export type Platforms = keyof typeof PLATFORMS_MAP;
 
 export function getPlatforms(win: any) {
-  return win.Ionic.platforms;
+  return setupPlatforms(win);
 }
 
 export function isPlatform(win: Window, platform: Platforms) {
@@ -26,12 +26,15 @@ export function isPlatform(win: Window, platform: Platforms) {
 }
 
 export function setupPlatforms(win: any) {
+  win.Ionic = win.Ionic || {};
+
   let platforms: string[] = win.Ionic.platforms;
   if (platforms == null) {
     platforms = win.Ionic.platforms = detectPlatforms(win);
     const classList = win.document.documentElement.classList;
     platforms.forEach(p => classList.add(`plt-${p}`));
   }
+  return platforms;
 }
 
 function detectPlatforms(win: Window): string[] {