diff --git a/configure b/configure
index 37638ffd31..a9ea1093da 100755
--- a/configure
+++ b/configure
@@ -37242,19 +37242,6 @@ $as_echo "$as_me: WARNING: GStreamer not available... disabling wxMediaCtrl" >&2
 fi
 
 
-if test "$cross_compiling" != "no"; then
-        OSINFO="\"$host\""
-else
-        OSINFO=`uname -s -r -m`
-    OSINFO="\"$OSINFO\""
-fi
-
-cat >>confdefs.h <<_ACEOF
-#define WXWIN_OS_DESCRIPTION $OSINFO
-_ACEOF
-
-
-
 if test "x$prefix" != "xNONE"; then
     wxPREFIX=$prefix
 else
diff --git a/configure.in b/configure.in
index c10f59aa0f..58722d25dc 100644
--- a/configure.in
+++ b/configure.in
@@ -7395,21 +7395,6 @@ if test "$wxUSE_MEDIACTRL" = "yes" -o "$wxUSE_MEDIACTRL" = "auto"; then
     fi
 fi
 
-dnl ---------------------------------------------------------------------------
-dnl get the string with OS info - used by wxGetOsDescription() on MacOS X
-dnl ---------------------------------------------------------------------------
-
-if test "$cross_compiling" != "no"; then
-    dnl Use best guess from host as we can't use uname when cross compiling
-    OSINFO="\"$host\""
-else
-    dnl attualy work out OS version
-    OSINFO=`uname -s -r -m`
-    OSINFO="\"$OSINFO\""
-fi
-
-AC_DEFINE_UNQUOTED(WXWIN_OS_DESCRIPTION, $OSINFO)
-
 dnl ---------------------------------------------------------------------------
 dnl define the variable containing the installation prefix (used in dcpsg.cpp)
 dnl ---------------------------------------------------------------------------
diff --git a/docs/changes.txt b/docs/changes.txt
index 9b3a97f556..62d13a4659 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -33,6 +33,8 @@ Changes in behaviour which may result in build errors
 - "webview" library is not included in `wx-config --libs` output any more, you
   need to request it explicitly, e.g. `wx-config --libs std,webview`.
 
+- WXWIN_OS_DESCRIPTION doesn't exist any longer, use wxGetOsDescription().
+
 
 3.1.0: (released 2015-xx-xx)
 ----------------------------
diff --git a/include/wx/osx/config_xcode.h b/include/wx/osx/config_xcode.h
index 31f726e8cd..b49ced6df2 100644
--- a/include/wx/osx/config_xcode.h
+++ b/include/wx/osx/config_xcode.h
@@ -122,7 +122,6 @@
 #define HAVE_LOCALE_T 1
 #define wxHAS_KQUEUE 1
 
-#define WXWIN_OS_DESCRIPTION "Darwin 7.9.0 Power Macintosh"
 #define PACKAGE_BUGREPORT "wx-dev@lists.wxwidgets.org"
 #define PACKAGE_NAME "wxWidgets"
 #define PACKAGE_STRING "wxWidgets 3.1.0"
diff --git a/samples/minimal/makefile.mic b/samples/minimal/makefile.mic
index 6cabbbfdcc..46528f9c68 100644
--- a/samples/minimal/makefile.mic
+++ b/samples/minimal/makefile.mic
@@ -29,7 +29,7 @@ include $(CONFIG)
 # Directories list for header files
 INCLUDEDIRS += -I$(WXDIR)/include
 # Defines for preprocessor
-DEFINES += -DMWIN -D__WXMSW__ -D__WXMICROWIN__ -D__WXUNIVERSAL__ -D__WIN32__ -D__WIN95__ -DHAVE_BOOL -DMICROWIN_TODO=1 -D__UNIX__ -DHAVE_NANOSLEEP -DMICROWIN_NOCONTROLS -D__WXDEBUG__ -DwxSIZE_T_IS_UINT -DWXWIN_OS_DESCRIPTION="\"MicroWindows\""
+DEFINES += -DMWIN -D__WXMSW__ -D__WXMICROWIN__ -D__WXUNIVERSAL__ -D__WIN32__ -D__WIN95__ -DHAVE_BOOL -DMICROWIN_TODO=1 -D__UNIX__ -DHAVE_NANOSLEEP -DMICROWIN_NOCONTROLS -D__WXDEBUG__ -DwxSIZE_T_IS_UINT
 
 # Compilation flags for C files OTHER than include directories
 CFLAGS +=
diff --git a/samples/widgets/makefile.mic b/samples/widgets/makefile.mic
index cec3b76cfa..88314e7ece 100644
--- a/samples/widgets/makefile.mic
+++ b/samples/widgets/makefile.mic
@@ -30,7 +30,7 @@ include $(CONFIG)
 # Directories list for header files
 INCLUDEDIRS += -I$(WXDIR)/include
 # Defines for preprocessor
-DEFINES += -DMWIN -D__WXMSW__ -D__WXMICROWIN__ -D__WXUNIVERSAL__ -D__WIN32__ -D__WIN95__ -DHAVE_BOOL -DMICROWIN_TODO=1 -D__UNIX__ -DHAVE_NANOSLEEP -DMICROWIN_NOCONTROLS -D__WXDEBUG__ -DwxSIZE_T_IS_UINT -DWXWIN_OS_DESCRIPTION="\"MicroWindows\""
+DEFINES += -DMWIN -D__WXMSW__ -D__WXMICROWIN__ -D__WXUNIVERSAL__ -D__WIN32__ -D__WIN95__ -DHAVE_BOOL -DMICROWIN_TODO=1 -D__UNIX__ -DHAVE_NANOSLEEP -DMICROWIN_NOCONTROLS -D__WXDEBUG__ -DwxSIZE_T_IS_UINT
 
 # Compilation flags for C files OTHER than include directories
 CFLAGS +=
diff --git a/setup.h.in b/setup.h.in
index 18cc641f92..d9af56147b 100644
--- a/setup.h.in
+++ b/setup.h.in
@@ -14,9 +14,6 @@
 
 #endif /* __cplusplus */
 
-/* fill in with the string wxGetOsDescription() will return */
-#undef WXWIN_OS_DESCRIPTION
-
 /* the installation location prefix from configure */
 #undef wxINSTALL_PREFIX
 
diff --git a/setup.h_vms b/setup.h_vms
index ffadeb77ae..28224912ac 100644
--- a/setup.h_vms
+++ b/setup.h_vms
@@ -30,9 +30,6 @@
 
 #endif /* __cplusplus */
 
-/* fill in with the string wxGetOsDescription() will return */
-#define WXWIN_OS_DESCRIPTION "OpenVMS"
-
 /* the installation location prefix from configure */
 #undef wxINSTALL_PREFIX
 
diff --git a/src/x11/makefile.unx b/src/x11/makefile.unx
index 60d21f875b..da23b96819 100644
--- a/src/x11/makefile.unx
+++ b/src/x11/makefile.unx
@@ -274,7 +274,7 @@ include $(CONFIG)
 # Directories list for header files
 INCLUDEDIRS += -I$(WXDIR)/include
 # Defines for preprocessor
-DEFINES += -DMWIN -D__WXMSW__ -D__WXMICROWIN__ -D__WXUNIVERSAL__ -D__WIN32__ -D__WIN95__ -DHAVE_BOOL -DMICROWIN_TODO=1 -D__UNIX__ -DHAVE_NANOSLEEP -DMICROWIN_NOCONTROLS -D__WXDEBUG__ -DwxSIZE_T_IS_UINT -DWXWIN_OS_DESCRIPTION="\"MicroWindows\""
+DEFINES += -DMWIN -D__WXMSW__ -D__WXMICROWIN__ -D__WXUNIVERSAL__ -D__WIN32__ -D__WIN95__ -DHAVE_BOOL -DMICROWIN_TODO=1 -D__UNIX__ -DHAVE_NANOSLEEP -DMICROWIN_NOCONTROLS -D__WXDEBUG__ -DwxSIZE_T_IS_UINT
 
 # Compilation flags for C files OTHER than include directories
 CFLAGS +=