diff --git a/src/App/ApplicationPy.cpp b/src/App/ApplicationPy.cpp
index e4acb4d60772..8373b18f34e4 100644
--- a/src/App/ApplicationPy.cpp
+++ b/src/App/ApplicationPy.cpp
@@ -106,9 +106,9 @@ PyMethodDef Application::Methods[] = {
      "* If no module is given it will be determined by the file extension.\n"
      "* If more than one module can load a file the first one one will be taken.\n"
      "* If no module exists to load the file an exception will be raised."},
-    {"open",   (PyCFunction) Application::sOpenDocument, METH_VARARGS|METH_KEYWORDS,
+    {"open",   reinterpret_cast<PyCFunction>(reinterpret_cast<void (*) (void)>( Application::sOpenDocument )), METH_VARARGS|METH_KEYWORDS,
      "See openDocument(string)"},
-    {"openDocument",   (PyCFunction) Application::sOpenDocument, METH_VARARGS|METH_KEYWORDS,
+    {"openDocument",   reinterpret_cast<PyCFunction>(reinterpret_cast<void (*) (void)>( Application::sOpenDocument )), METH_VARARGS|METH_KEYWORDS,
      "openDocument(filepath,hidden=False) -> object\n"
      "Create a document and load the project file into the document.\n\n"
      "filepath: file path to an existing file. If the file doesn't exist\n"
@@ -118,7 +118,7 @@ PyMethodDef Application::Methods[] = {
 //  {"saveDocument",   (PyCFunction) Application::sSaveDocument, METH_VARARGS,
 //   "saveDocument(string) -- Save the document to a file."},
 //  {"saveDocumentAs", (PyCFunction) Application::sSaveDocumentAs, METH_VARARGS},
-    {"newDocument",    (PyCFunction) Application::sNewDocument, METH_VARARGS|METH_KEYWORDS,
+    {"newDocument",    reinterpret_cast<PyCFunction>(reinterpret_cast<void (*) (void)>( Application::sNewDocument )), METH_VARARGS|METH_KEYWORDS,
      "newDocument(name, label=None, hidden=False) -> object\n"
      "Create a new document with a given name.\n\n"
      "name: unique document name which is checked automatically.\n"
diff --git a/src/Gui/Selection.cpp b/src/Gui/Selection.cpp
index df7e42f2a8d6..8a244eab52cc 100644
--- a/src/Gui/Selection.cpp
+++ b/src/Gui/Selection.cpp
@@ -1809,7 +1809,7 @@ PyMethodDef SelectionSingleton::Methods[] = {
      "given the complete selection is cleared."},
     {"isSelected",           (PyCFunction) SelectionSingleton::sIsSelected, METH_VARARGS,
      "isSelected(object,resolve=True) -- Check if a given object is selected"},
-    {"setPreselection",      (PyCFunction) SelectionSingleton::sSetPreselection, METH_VARARGS|METH_KEYWORDS,
+    {"setPreselection",      reinterpret_cast<PyCFunction>(reinterpret_cast<void (*) (void)>( SelectionSingleton::sSetPreselection )), METH_VARARGS|METH_KEYWORDS,
      "setPreselection() -- Set preselected object"},
     {"getPreselection",      (PyCFunction) SelectionSingleton::sGetPreselection, METH_VARARGS,
      "getPreselection() -- Get preselected object"},