diff --git a/src/Mod/CAM/libarea/clipper.cpp b/src/Mod/CAM/libarea/clipper.cpp
index 7201194000..d11e36fd9a 100644
--- a/src/Mod/CAM/libarea/clipper.cpp
+++ b/src/Mod/CAM/libarea/clipper.cpp
@@ -302,6 +302,8 @@ public:
         , hi(_hi)
     {}
 
+    Int128& operator=(const Int128&) = default;
+
     Int128& operator=(const long64& val)
     {
         lo = (ulong64)val;