diff --git a/juce_amalgamated.cpp b/juce_amalgamated.cpp
index 91810240ea..be441200da 100644
--- a/juce_amalgamated.cpp
+++ b/juce_amalgamated.cpp
@@ -21554,13 +21554,8 @@ void AudioDeviceManager::addMidiInputCallback (const String& name,
             if (enabledMidiInputs[i]->getName() == name)
             {
                 const ScopedLock sl (midiCallbackLock);
-
-                if (! midiCallbacks.contains (callback))
-                {
-                    midiCallbacks.add (callback);
-                    midiCallbackDevices.add (enabledMidiInputs[i]);
-                }
-
+                midiCallbacks.add (callback);
+                midiCallbackDevices.add (enabledMidiInputs[i]);
                 break;
             }
         }
diff --git a/src/juce_appframework/audio/devices/juce_AudioDeviceManager.cpp b/src/juce_appframework/audio/devices/juce_AudioDeviceManager.cpp
index 0511cf4ab6..54230b4d8e 100644
--- a/src/juce_appframework/audio/devices/juce_AudioDeviceManager.cpp
+++ b/src/juce_appframework/audio/devices/juce_AudioDeviceManager.cpp
@@ -764,13 +764,8 @@ void AudioDeviceManager::addMidiInputCallback (const String& name,
             if (enabledMidiInputs[i]->getName() == name)
             {
                 const ScopedLock sl (midiCallbackLock);
-
-                if (! midiCallbacks.contains (callback))
-                {
-                    midiCallbacks.add (callback);
-                    midiCallbackDevices.add (enabledMidiInputs[i]);
-                }
-
+                midiCallbacks.add (callback);
+                midiCallbackDevices.add (enabledMidiInputs[i]);
                 break;
             }
         }