diff --git a/app/src/main/kotlin/jackall/overlaymulticounter/common/PreferenceKeys.kt b/app/src/main/kotlin/jackall/overlaymulticounter/common/PreferenceKeys.kt
index 573fd4f..a14910e 100644
--- a/app/src/main/kotlin/jackall/overlaymulticounter/common/PreferenceKeys.kt
+++ b/app/src/main/kotlin/jackall/overlaymulticounter/common/PreferenceKeys.kt
@@ -6,6 +6,7 @@
  * Created by matsumoto_k on 2017/11/08.
  */
 enum class PreferenceKeys(val preferenceNames: PreferenceNames, val valueClass: Class<*>, val key: String) {
-    VIEWX(PreferenceNames.CONFIG, Int::class.java, "viewX"),
-    VIEWY(PreferenceNames.CONFIG, Int::class.java, "viewY")
+    viewX(PreferenceNames.CONFIG, Int::class.java, "viewX"),
+    viewY(PreferenceNames.CONFIG, Int::class.java, "viewY"),
+    interstitialCount(PreferenceNames.CONFIG,Int::class.java,"intersititialCount")
 }
\ No newline at end of file