diff --git a/CHANGELOG.md b/CHANGELOG.md
index 207ecad8..bf968002 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -149,6 +149,7 @@
 - Bugfix: Fixed crash happening when QuickSwitcher is used with a popout window. (#4187)
 - Bugfix: Fixed low contrast of text in settings tooltips. (#4188)
 - Bugfix: Fixed being unable to see the usercard of VIPs who have Asian language display names. (#4174)
+- Bugfix: Fixed whispers always being shown in the /mentions split. (#4389)
 - Bugfix: Fixed messages where Right-to-Left order is mixed in multiple lines. (#4173)
 - Bugfix: Fixed the wrong right-click menu showing in the chat input box. (#4177)
 - Bugfix: Fixed popup windows not appearing/minimizing correctly on the Windows taskbar. (#4181)
diff --git a/src/providers/twitch/IrcMessageHandler.cpp b/src/providers/twitch/IrcMessageHandler.cpp
index 1c04eac4..43fa8d49 100644
--- a/src/providers/twitch/IrcMessageHandler.cpp
+++ b/src/providers/twitch/IrcMessageHandler.cpp
@@ -810,7 +810,7 @@ void IrcMessageHandler::handleWhisperMessage(Communi::IrcMessage *message)
 
     getApp()->twitch->lastUserThatWhisperedMe.set(builder.userName);
 
-    if (_message->flags.has(MessageFlag::Highlighted))
+    if (_message->flags.has(MessageFlag::ShowInMentions))
     {
         getApp()->twitch->mentionsChannel->addMessage(_message);
     }
diff --git a/tests/src/HighlightController.cpp b/tests/src/HighlightController.cpp
index c712709d..eecb9cc3 100644
--- a/tests/src/HighlightController.cpp
+++ b/tests/src/HighlightController.cpp
@@ -3,6 +3,7 @@
 #include "Application.hpp"
 #include "BaseSettings.hpp"
 #include "controllers/accounts/AccountController.hpp"
+#include "controllers/highlights/HighlightPhrase.hpp"
 #include "messages/MessageBuilder.hpp"  // for MessageParseArgs
 #include "mocks/UserData.hpp"
 #include "providers/twitch/api/Helix.hpp"
@@ -774,6 +775,56 @@ TEST_F(HighlightControllerTest, A)
                 },
             },
         },
+        {
+            // TEST CASE: Whispers that do not hit a highlight phrase should not be added to /mentions
+            {
+                // input
+                .args =
+                    MessageParseArgs{
+                        .isReceivedWhisper = true,
+                    },
+                .senderName = "forsen",
+                .originalMessage = "Hello NymN!",
+            },
+            {
+                // expected
+                .state = true,  // state
+                .result =
+                    {
+                        false,        // alert
+                        false,        // playsound
+                        boost::none,  // custom sound url
+                        std::make_shared<QColor>(
+                            HighlightPhrase::
+                                FALLBACK_HIGHLIGHT_COLOR),  // color
+                        false,                              // showInMentions
+                    },
+            },
+        },
+        {
+            // TEST CASE: Whispers that do hit a highlight phrase should be added to /mentions
+            {
+                // input
+                .args =
+                    MessageParseArgs{
+                        .isReceivedWhisper = true,
+                    },
+                .senderName = "forsen",
+                .originalMessage = "!testmanxd",
+            },
+            {
+                // expected
+                .state = true,  // state
+                .result =
+                    {
+                        true,         // alert
+                        true,         // playsound
+                        boost::none,  // custom sound url
+                        std::make_shared<QColor>("#7f7f3f49"),  // color
+                        true,  // showInMentions
+                    },
+            },
+        },
     };
 
     for (const auto &[input, expected] : tests)