diff --git a/src/system.cpp b/src/system.cpp
index d131f11..a39f69a 100644
--- a/src/system.cpp
+++ b/src/system.cpp
@@ -97,7 +97,6 @@ void System::EvalJacobian() {
 }
 
 bool System::IsDragged(hParam p) {
-    hParam *pp;
     const auto b = dragged.begin();
     const auto e = dragged.end();
     return e != std::find(b, e, p);