diff --git a/modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm b/modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm
index a072a821f6..b5f8e54672 100644
--- a/modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm
+++ b/modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm
@@ -801,6 +801,8 @@ public:
 
     void setCurrentProgramStateInformation (const void* data, int sizeInBytes) override
     {
+        initialiseAudioUnit();
+
         CFReadStreamRef stream = CFReadStreamCreateWithBytesNoCopy (kCFAllocatorDefault, (const UInt8*) data,
                                                                     sizeInBytes, kCFAllocatorNull);
         CFReadStreamOpen (stream);