diff --git a/plugins/debug.cpp b/plugins/debug.cpp
index 30a5028f8..4fbc48759 100644
--- a/plugins/debug.cpp
+++ b/plugins/debug.cpp
@@ -511,6 +511,8 @@ private:
     DebugManager::categorySignal_t::Connection connection_;
 };
 
+constexpr const char* FilterManager::configPath;
+
 FilterManager::~FilterManager()
 {
 }