diff --git a/src/Gui/SplitView3DInventor.cpp b/src/Gui/SplitView3DInventor.cpp
index 51c424f0f1..1f058250dd 100644
--- a/src/Gui/SplitView3DInventor.cpp
+++ b/src/Gui/SplitView3DInventor.cpp
@@ -719,7 +719,7 @@ Py::Object AbstractSplitViewPy::getViewer(const Py::Tuple& args)
     }
 }
 
-Py::Object AbstractSplitViewPy::sequence_item(ssize_t viewIndex)
+Py::Object AbstractSplitViewPy::sequence_item(Py_ssize_t viewIndex)
 {
     AbstractSplitView* view = getSplitViewPtr();
     if (viewIndex >= view->getSize() || viewIndex < 0)
diff --git a/src/Gui/SplitView3DInventor.h b/src/Gui/SplitView3DInventor.h
index 51247ef71d..7cac36de13 100644
--- a/src/Gui/SplitView3DInventor.h
+++ b/src/Gui/SplitView3DInventor.h
@@ -98,7 +98,7 @@ public:
     Py::Object viewTop(const Py::Tuple&);
     Py::Object viewIsometric(const Py::Tuple&);
     Py::Object getViewer(const Py::Tuple&);
-    Py::Object sequence_item(ssize_t);
+    Py::Object sequence_item(Py_ssize_t);
     Py::Object close(const Py::Tuple&);
     int sequence_length();