diff --git a/modules/juce_audio_plugin_client/AU/juce_AU_Wrapper.mm b/modules/juce_audio_plugin_client/AU/juce_AU_Wrapper.mm
index 0a8b130474..a37f59cf48 100644
--- a/modules/juce_audio_plugin_client/AU/juce_AU_Wrapper.mm
+++ b/modules/juce_audio_plugin_client/AU/juce_AU_Wrapper.mm
@@ -865,7 +865,7 @@ public:
            #ifdef JucePlugin_PreferredChannelConfigurations
             short configs[][2] = {JucePlugin_PreferredChannelConfigurations};
 
-            if (! AudioUnitHelpers::isLayoutSupported (*juceFilter, isInput, busNr, newChannelNum, configs))
+            if (! AudioUnitHelpers::isLayoutSupported (*juceFilter, info.isInput, info.busNr, newChannelNum, configs))
                 return kAudioUnitErr_FormatNotSupported;
            #else
             if (! juceFilter->getBus (info.isInput, info.busNr)->isLayoutSupported (newChannelSet))
@@ -1244,7 +1244,7 @@ public:
             short configs[][2] = {JucePlugin_PreferredChannelConfigurations};
 
             ignoreUnused (bus);
-            return AudioUnitHelpers::isLayoutSupported (*juceFilter, isInput, busNr, newNumChannels, configs);
+            return AudioUnitHelpers::isLayoutSupported (*juceFilter, info.isInput, info.busNr, newNumChannels, configs);
            #else
             return bus->isNumberOfChannelsSupported (newNumChannels);
            #endif
@@ -1269,7 +1269,7 @@ public:
        #ifdef JucePlugin_PreferredChannelConfigurations
         short configs[][2] = {JucePlugin_PreferredChannelConfigurations};
 
-        if (! AudioUnitHelpers::isLayoutSupported (*juceFilter, isInput, busNr, newNumChannels, configs))
+        if (! AudioUnitHelpers::isLayoutSupported (*juceFilter, info.isInput, info.busNr, newNumChannels, configs))
             return kAudioUnitErr_FormatNotSupported;
        #endif
 
diff --git a/modules/juce_audio_processors/format_types/juce_AU_Shared.h b/modules/juce_audio_processors/format_types/juce_AU_Shared.h
index 570677aff0..fe84c1acf5 100644
--- a/modules/juce_audio_processors/format_types/juce_AU_Shared.h
+++ b/modules/juce_audio_processors/format_types/juce_AU_Shared.h
@@ -512,7 +512,7 @@ struct AudioUnitHelpers
             const bool isInput = (dir == 0);
 
             const int actualBuses = juceFilter->getBusCount (isInput);
-            const int auNumBuses  = getBusCount (juceFilter, isInput);
+            const int auNumBuses  = getBusCount (*juceFilter, isInput);
             Array<AudioChannelSet>& buses = (isInput ? copy.inputBuses : copy.outputBuses);
 
             for (int i = auNumBuses; i < actualBuses; ++i)
@@ -535,7 +535,7 @@ struct AudioUnitHelpers
             const bool isInput = (dir == 0);
 
             const int actualBuses = juceFilter->getBusCount (isInput);
-            const int auNumBuses  = getBusCount (juceFilter, isInput);
+            const int auNumBuses  = getBusCount (*juceFilter, isInput);
             auto& buses = (isInput ? layout.inputBuses : layout.outputBuses);
 
             for (int i = auNumBuses; i < actualBuses; ++i)