diff --git a/demo15/src/main/res/values/strings.xml b/demo15/src/main/res/values/strings.xml
index 24f19be..5af2701 100644
--- a/demo15/src/main/res/values/strings.xml
+++ b/demo15/src/main/res/values/strings.xml
@@ -21,4 +21,5 @@
     </string-array>
 
     <string name="wunderground_key">your_key</string>
+    <string name="forecastio_key">your_key</string>
 </resources>