diff --git a/include/wx/selstore.h b/include/wx/selstore.h
index 02545e12b3..2cf420dc63 100644
--- a/include/wx/selstore.h
+++ b/include/wx/selstore.h
@@ -94,7 +94,7 @@ public:
     typedef size_t IterationState;
 
     // constant representing absence of selection and hence end of iteration
-    static const unsigned NO_SELECTION = static_cast<unsigned>(-1);
+    static const unsigned NO_SELECTION;
 
     // get the first selected item in index order, return NO_SELECTION if none
     unsigned GetFirstSelectedItem(IterationState& cookie) const;
diff --git a/src/generic/selstore.cpp b/src/generic/selstore.cpp
index 5ce9e5cd41..af2dd12a41 100644
--- a/src/generic/selstore.cpp
+++ b/src/generic/selstore.cpp
@@ -28,6 +28,8 @@
 // wxSelectionStore
 // ============================================================================
 
+const unsigned wxSelectionStore::NO_SELECTION = static_cast<unsigned>(-1);
+
 // ----------------------------------------------------------------------------
 // tests
 // ----------------------------------------------------------------------------