diff --git a/modules/juce_audio_processors/processors/juce_AudioProcessorEditor.cpp b/modules/juce_audio_processors/processors/juce_AudioProcessorEditor.cpp
index 30249c0a53..038fbb5d7c 100644
--- a/modules/juce_audio_processors/processors/juce_AudioProcessorEditor.cpp
+++ b/modules/juce_audio_processors/processors/juce_AudioProcessorEditor.cpp
@@ -73,7 +73,7 @@ void AudioProcessorEditor::initialise()
 
     // END SECTION A
 
-    setConstrainer (&defaultConstrainer);
+    attachConstrainer (&defaultConstrainer);
     resizeListener.reset (new AudioProcessorEditorListener (*this));
     addComponentListener (resizeListener.get());
 }
@@ -124,8 +124,7 @@ void AudioProcessorEditor::setConstrainer (ComponentBoundsConstrainer* newConstr
 {
     if (constrainer != newConstrainer)
     {
-        constrainer = newConstrainer;
-        updatePeer();
+        attachConstrainer (newConstrainer);
 
         if (constrainer != nullptr)
             resizableByHost = (newConstrainer->getMinimumWidth() != newConstrainer->getMaximumWidth()
@@ -136,6 +135,15 @@ void AudioProcessorEditor::setConstrainer (ComponentBoundsConstrainer* newConstr
     }
 }
 
+void AudioProcessorEditor::attachConstrainer (ComponentBoundsConstrainer* newConstrainer)
+{
+    if (constrainer != newConstrainer)
+    {
+        constrainer = newConstrainer;
+        updatePeer();
+    }
+}
+
 void AudioProcessorEditor::attachResizableCornerComponent()
 {
     resizableCorner = std::make_unique<ResizableCornerComponent> (this, constrainer);
diff --git a/modules/juce_audio_processors/processors/juce_AudioProcessorEditor.h b/modules/juce_audio_processors/processors/juce_AudioProcessorEditor.h
index c925540c90..af6a73eca3 100644
--- a/modules/juce_audio_processors/processors/juce_AudioProcessorEditor.h
+++ b/modules/juce_audio_processors/processors/juce_AudioProcessorEditor.h
@@ -211,6 +211,7 @@ private:
     void initialise();
     void editorResized (bool wasResized);
     void updatePeer();
+    void attachConstrainer (ComponentBoundsConstrainer*);
     void attachResizableCornerComponent();
 
     //==============================================================================