diff --git a/wrap/Class.cpp b/wrap/Class.cpp
index c5a39df56..cd7dd4ca6 100644
--- a/wrap/Class.cpp
+++ b/wrap/Class.cpp
@@ -729,7 +729,7 @@ void Class::python_wrapper(FileWriter& wrapperFile) const {
 }
 
 /* ************************************************************************* */
-void Class::emit_cython_pxd(FileWriter& pxdFile, const std::vector<Class>& allClasses) const {
+void Class::emit_cython_pxd(FileWriter& pxdFile) const {
   pxdFile.oss << "cdef extern from \"" << includeFile << "\" namespace \""
                 << qualifiedNamespaces("::") << "\":" << endl;
   pxdFile.oss << "    cdef cppclass " << pxdClassName() << " \"" << qualifiedName("::") << "\"";
diff --git a/wrap/Class.h b/wrap/Class.h
index c8f73c1c1..3c9264d17 100644
--- a/wrap/Class.h
+++ b/wrap/Class.h
@@ -155,7 +155,7 @@ public:
   void python_wrapper(FileWriter& wrapperFile) const;
 
   // emit cython wrapper
-  void emit_cython_pxd(FileWriter& pxdFile, const std::vector<Class>& allClasses) const;
+  void emit_cython_pxd(FileWriter& pxdFile) const;
   void emit_cython_pyx(FileWriter& pyxFile,
                        const std::vector<Class>& allClasses) const;
   void pyxInitParentObj(FileWriter& pyxFile, const std::string& pyObj,