diff --git a/services/core/java/com/android/server/notification/RankingHelper.java b/services/core/java/com/android/server/notification/RankingHelper.java
index 221b2bb0886ad..32de3166faae8 100644
--- a/services/core/java/com/android/server/notification/RankingHelper.java
+++ b/services/core/java/com/android/server/notification/RankingHelper.java
@@ -561,7 +561,7 @@ public class RankingHelper implements RankingConfig {
             updateConfig();
             return;
         }
-        if (channel.getImportance() < NotificationManager.IMPORTANCE_NONE
+        if (channel.getImportance() < NotificationManager.IMPORTANCE_MIN
                 || channel.getImportance() > NotificationManager.IMPORTANCE_MAX) {
             throw new IllegalArgumentException("Invalid importance level");
         }
diff --git a/services/tests/notification/src/com/android/server/notification/RankingHelperTest.java b/services/tests/notification/src/com/android/server/notification/RankingHelperTest.java
index 303054e777934..bc5c29d514a55 100644
--- a/services/tests/notification/src/com/android/server/notification/RankingHelperTest.java
+++ b/services/tests/notification/src/com/android/server/notification/RankingHelperTest.java
@@ -18,6 +18,7 @@ package com.android.server.notification;
 import static android.app.NotificationManager.IMPORTANCE_DEFAULT;
 import static android.app.NotificationManager.IMPORTANCE_HIGH;
 import static android.app.NotificationManager.IMPORTANCE_LOW;
+import static android.app.NotificationManager.IMPORTANCE_NONE;
 
 import static junit.framework.Assert.assertNull;
 import static junit.framework.Assert.fail;
@@ -504,12 +505,23 @@ public class RankingHelperTest {
 
     @Test
     public void testCreateChannel_blocked() throws Exception {
-        mHelper.setImportance(PKG, UID, NotificationManager.IMPORTANCE_NONE);
+        mHelper.setImportance(PKG, UID, IMPORTANCE_NONE);
 
         mHelper.createNotificationChannel(PKG, UID,
                 new NotificationChannel("bananas", "bananas", IMPORTANCE_LOW), true);
     }
 
+    @Test
+    public void testCreateChannel_ImportanceNone() throws Exception {
+        try {
+            mHelper.createNotificationChannel(PKG, UID,
+                    new NotificationChannel("bananas", "bananas", IMPORTANCE_NONE), true);
+            fail("Was allowed to create a blocked channel");
+        } catch (IllegalArgumentException e) {
+            // yay
+        }
+    }
+
 
     @Test
     public void testUpdate() throws Exception {