diff --git a/pyext/ctpsfcube.i b/pyext/ctpsfcube.i
index f7257a8..b7e3ec3 100644
--- a/pyext/ctpsfcube.i
+++ b/pyext/ctpsfcube.i
@@ -45,9 +45,6 @@ public:
     ctpsfcube(const ctpsfcube& app);
     virtual ~ctpsfcube(void);
 
-    // Operators
-    ctpsfcube& operator=(const ctpsfcube& app);
-
     // Methods
     void           clear(void);
     void           execute(void);