diff --git a/src/SlashCommands.js b/src/SlashCommands.js
index b72ea341b5..a7551a789c 100644
--- a/src/SlashCommands.js
+++ b/src/SlashCommands.js
@@ -244,10 +244,22 @@ const commands = {
         if (args) {
             const matches = args.match(/^(\S+)$/);
             if (matches) {
+                const userId = matches[1];
                 const ignoredUsers = MatrixClientPeg.get().getIgnoredUsers();
-                ignoredUsers.push(matches[1]); // de-duped internally below
+                ignoredUsers.push(userId); // de-duped internally below
                 return success(
-                    MatrixClientPeg.get().setIgnoredUsers(ignoredUsers),
+                    MatrixClientPeg.get().setIgnoredUsers(ignoredUsers).then(() => {
+                        const QuestionDialog = sdk.getComponent("dialogs.QuestionDialog");
+                        Modal.createTrackedDialog('Slash Commands', 'User ignored', QuestionDialog, {
+                            title: _t("Ignored user"),
+                            description: (
+                                <div>
+                                    <p>{_t("You are now ignoring %(userId)s", {userId: userId})}</p>
+                                </div>
+                            ),
+                            hasCancelButton: false,
+                        });
+                    }),
                 );
             }
         }
@@ -258,11 +270,23 @@ const commands = {
         if (args) {
             const matches = args.match(/^(\S+)$/);
             if (matches) {
+                const userId = matches[1];
                 const ignoredUsers = MatrixClientPeg.get().getIgnoredUsers();
-                const index = ignoredUsers.indexOf(matches[1]);
+                const index = ignoredUsers.indexOf(userId);
                 if (index !== -1) ignoredUsers.splice(index, 1);
                 return success(
-                    MatrixClientPeg.get().setIgnoredUsers(ignoredUsers),
+                    MatrixClientPeg.get().setIgnoredUsers(ignoredUsers).then(() => {
+                        const QuestionDialog = sdk.getComponent("dialogs.QuestionDialog");
+                        Modal.createTrackedDialog('Slash Commands', 'User unignored', QuestionDialog, {
+                            title: _t("Unignored user"),
+                            description: (
+                                <div>
+                                    <p>{_t("You are no longer ignoring %(userId)s", {userId: userId})}</p>
+                                </div>
+                            ),
+                            hasCancelButton: false,
+                        });
+                    }),
                 );
             }
         }
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index 57870a18e4..9b3135fa07 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -266,6 +266,10 @@
     "Labs": "Labs",
     "Ignored Users": "Ignored Users",
     "Unignore": "Unignore",
+    "You are now ignoring %(userId)s": "You are now ignoring %(userId)s",
+    "You are no longer ignoring %(userId)s": "You are no longer ignoring %(userId)s",
+    "Unignored user": "Unignored user",
+    "Ignored user": "Ignored user",
     "Last seen": "Last seen",
     "Leave room": "Leave room",
     "left and rejoined": "left and rejoined",
diff --git a/src/i18n/strings/en_US.json b/src/i18n/strings/en_US.json
index 225d6e28d7..7051967abc 100644
--- a/src/i18n/strings/en_US.json
+++ b/src/i18n/strings/en_US.json
@@ -233,6 +233,10 @@
     "Labs": "Labs",
     "Ignored Users": "Ignored Users",
     "Unignore": "Unignore",
+    "You are now ignoring %(userId)s": "You are now ignoring %(userId)s",
+    "You are no longer ignoring %(userId)s": "You are no longer ignoring %(userId)s",
+    "Unignored user": "Unignored user",
+    "Ignored user": "Ignored user",
     "Leave room": "Leave room",
     "left and rejoined": "left and rejoined",
     "left": "left",