diff --git a/app/src/main/java/com/topjohnwu/magisk/core/Hacks.kt b/app/src/main/java/com/topjohnwu/magisk/core/Hacks.kt
index 8e5472b56..ef9784d05 100644
--- a/app/src/main/java/com/topjohnwu/magisk/core/Hacks.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/core/Hacks.kt
@@ -161,12 +161,10 @@ object ClassMap {
 * being removed when running "remove unused resources" */
 val shouldKeepResources = listOf(
     /* TODO: The following strings should be used somewhere */
-    R.string.patch_file_msg,
     R.string.no_apps_found,
     R.string.no_info_provided,
     R.string.release_notes,
     R.string.settings_download_path_error,
-    R.string.install_inactive_slot_msg,
     R.string.invalid_update_channel,
     R.string.update_available
 )
diff --git a/app/src/main/java/com/topjohnwu/magisk/model/events/dialog/SecondSlotWarningDialog.kt b/app/src/main/java/com/topjohnwu/magisk/model/events/dialog/SecondSlotWarningDialog.kt
new file mode 100644
index 000000000..150afa28a
--- /dev/null
+++ b/app/src/main/java/com/topjohnwu/magisk/model/events/dialog/SecondSlotWarningDialog.kt
@@ -0,0 +1,16 @@
+package com.topjohnwu.magisk.model.events.dialog
+
+import com.topjohnwu.magisk.R
+import com.topjohnwu.magisk.view.MagiskDialog
+
+class SecondSlotWarningDialog : DialogEvent() {
+
+    override fun build(dialog: MagiskDialog) {
+        dialog.applyTitle(android.R.string.dialog_alert_title)
+            .applyMessage(R.string.install_inactive_slot_msg)
+            .applyButton(MagiskDialog.ButtonType.POSITIVE) {
+                titleRes = android.R.string.ok
+            }
+            .cancellable(true)
+    }
+}
diff --git a/app/src/main/java/com/topjohnwu/magisk/ui/install/InstallViewModel.kt b/app/src/main/java/com/topjohnwu/magisk/ui/install/InstallViewModel.kt
index 1f84e1ca6..2d8fa4110 100644
--- a/app/src/main/java/com/topjohnwu/magisk/ui/install/InstallViewModel.kt
+++ b/app/src/main/java/com/topjohnwu/magisk/ui/install/InstallViewModel.kt
@@ -1,14 +1,17 @@
 package com.topjohnwu.magisk.ui.install
 
 import android.net.Uri
+import android.widget.Toast
 import com.topjohnwu.magisk.R
 import com.topjohnwu.magisk.core.Info
 import com.topjohnwu.magisk.core.download.DownloadService
 import com.topjohnwu.magisk.core.download.RemoteFileService
+import com.topjohnwu.magisk.core.utils.Utils
 import com.topjohnwu.magisk.extensions.addOnPropertyChangedCallback
 import com.topjohnwu.magisk.model.entity.internal.Configuration
 import com.topjohnwu.magisk.model.entity.internal.DownloadSubject
 import com.topjohnwu.magisk.model.events.RequestFileEvent
+import com.topjohnwu.magisk.model.events.dialog.SecondSlotWarningDialog
 import com.topjohnwu.magisk.ui.base.BaseViewModel
 import com.topjohnwu.magisk.utils.KObservableField
 import com.topjohnwu.superuser.Shell
@@ -41,8 +44,14 @@ class InstallViewModel : BaseViewModel(State.LOADED) {
             }
         }
         method.addOnPropertyChangedCallback {
-            if (method.value == R.id.method_patch) {
-                RequestFileEvent().publish()
+            when (method.value) {
+                R.id.method_patch -> {
+                    Utils.toast(R.string.patch_file_msg, Toast.LENGTH_LONG)
+                    RequestFileEvent().publish()
+                }
+                R.id.method_inactive_slot -> {
+                    SecondSlotWarningDialog().publish()
+                }
             }
         }
     }