diff --git a/src/Mod/Assembly/App/AssemblyObject.cpp b/src/Mod/Assembly/App/AssemblyObject.cpp
index 26ff5ec4af..41f57ce4a4 100644
--- a/src/Mod/Assembly/App/AssemblyObject.cpp
+++ b/src/Mod/Assembly/App/AssemblyObject.cpp
@@ -144,6 +144,11 @@ void AssemblyObject::onChanged(const App::Property* prop)
 
 // ── Solver integration ─────────────────────────────────────────────
 
+void AssemblyObject::resetSolver()
+{
+    solver_.reset();
+}
+
 KCSolve::IKCSolver* AssemblyObject::getOrCreateSolver()
 {
     if (!solver_) {
diff --git a/src/Mod/Assembly/App/AssemblyObject.h b/src/Mod/Assembly/App/AssemblyObject.h
index 6355040f5c..f322c525f4 100644
--- a/src/Mod/Assembly/App/AssemblyObject.h
+++ b/src/Mod/Assembly/App/AssemblyObject.h
@@ -98,7 +98,7 @@ public:
     void postDrag();
     void savePlacementsForUndo();
     void undoSolve();
-    void resetSolver() { solver_.reset(); }
+    void resetSolver();
     void clearUndo();
 
     void exportAsASMT(std::string fileName);