diff --git a/include/PluginFactory.h b/include/PluginFactory.h
index 41ce486d7f9..126cb7d972b 100644
--- a/include/PluginFactory.h
+++ b/include/PluginFactory.h
@@ -105,7 +105,7 @@ public slots:
 
 	static std::unique_ptr<PluginFactory> s_instance;
 
-	static QList<QRegularExpression> filterPlugins(QSet<QFileInfo>& files);
+	static void filterPlugins(QSet<QFileInfo>& files);
 };
 
 //Short-hand function
diff --git a/src/core/PluginFactory.cpp b/src/core/PluginFactory.cpp
index 6664d9d8052..207d31077a8 100644
--- a/src/core/PluginFactory.cpp
+++ b/src/core/PluginFactory.cpp
@@ -250,7 +250,7 @@ void PluginFactory::discoverPlugins()
 }
 
 // Filter plugins based on environment variable, e.g. export LMMS_EXCLUDE_PLUGINS="*carla*"
-QSet<QFileInfo> filterPlugins(QSet<QFileInfo>& files) {
+void PluginFactory::filterPlugins(QSet<QFileInfo>& files) {
 	// Get filter
 	QList<QRegularExpression> excludedPatterns;
 	QString excludePatternString = std::getenv("LMMS_EXCLUDE_PLUGINS");