diff --git a/modules/juce_audio_plugin_client/Standalone/juce_StandaloneFilterWindow.h b/modules/juce_audio_plugin_client/Standalone/juce_StandaloneFilterWindow.h
index 342697e76c..a750cc3633 100644
--- a/modules/juce_audio_plugin_client/Standalone/juce_StandaloneFilterWindow.h
+++ b/modules/juce_audio_plugin_client/Standalone/juce_StandaloneFilterWindow.h
@@ -25,7 +25,7 @@
 */
 
 #if JUCE_MODULE_AVAILABLE_juce_audio_plugin_client
- extern AudioProcessor* JUCE_API JUCE_CALLTYPE createPluginFilterOfType (AudioProcessor::WrapperType type);
+extern juce::AudioProcessor* JUCE_API JUCE_CALLTYPE createPluginFilterOfType (juce::AudioProcessor::WrapperType type);
 #endif
 
 namespace juce