diff --git a/include/wx/datetime.inl b/include/wx/datetime.inl
index 7b9360ffb0..20bcf4c58a 100644
--- a/include/wx/datetime.inl
+++ b/include/wx/datetime.inl
@@ -35,13 +35,6 @@
 // wxDateTime construction
 // ----------------------------------------------------------------------------
 
-// only define this once, when included from datetime.cpp
-// TODO: figure out why switching accessibility on causes link errors
-// if don't use this test.
-#if defined(wxDEFINE_TIME_CONSTANTS) || (defined(_MSC_VER) && wxUSE_ACCESSIBILITY)
-    const long wxDateTime::TIME_T_FACTOR = 1000l;
-#endif // wxDEFINE_TIME_CONSTANTS
-
 inline bool wxDateTime::IsInStdRange() const
 {
     return m_time >= 0l && (m_time / TIME_T_FACTOR) < LONG_MAX;
diff --git a/src/common/datetime.cpp b/src/common/datetime.cpp
index d796e6e127..45a15e0c88 100644
--- a/src/common/datetime.cpp
+++ b/src/common/datetime.cpp
@@ -82,6 +82,8 @@
 #include "wx/datetime.h"
 #include "wx/timer.h"           // for wxGetLocalTimeMillis()
 
+const long wxDateTime::TIME_T_FACTOR = 1000l;
+
 // ----------------------------------------------------------------------------
 // conditional compilation
 // ----------------------------------------------------------------------------