diff --git a/src/core/sys/windows/winbase.d b/src/core/sys/windows/winbase.d
@@ -8,6 +8,8 @@
  */
 module core.sys.windows.winbase;
 version (Windows):
+
+version (ANSI) {} else version = Unicode;
 pragma(lib, "kernel32");
 
 /**

diff --git a/src/core/sys/windows/wincon.d b/src/core/sys/windows/wincon.d
@@ -8,6 +8,8 @@
  */
 module core.sys.windows.wincon;
 version (Windows):
+
+version (ANSI) {} else version = Unicode;
 pragma(lib, "kernel32");
 
 private import core.sys.windows.w32api, core.sys.windows.windef;

diff --git a/src/core/sys/windows/wincrypt.d b/src/core/sys/windows/wincrypt.d
@@ -10,6 +10,8 @@
 module core.sys.windows.wincrypt;
 version (Windows):
 
+version (ANSI) {} else version = Unicode;
+
 private import core.sys.windows.w32api, core.sys.windows.winbase, core.sys.windows.windef;
 
 /* FIXME:

diff --git a/src/core/sys/windows/wingdi.d b/src/core/sys/windows/wingdi.d
@@ -8,6 +8,8 @@
  */
 module core.sys.windows.wingdi;
 version (Windows):
+
+version (ANSI) {} else version = Unicode;
 pragma(lib, "gdi32");
 
 // FIXME: clean up Windows version support

diff --git a/src/core/sys/windows/wininet.d b/src/core/sys/windows/wininet.d
@@ -9,6 +9,8 @@
  */
 module core.sys.windows.wininet;
 version (Windows):
+
+version (ANSI) {} else version = Unicode;
 pragma(lib, "wininet");
 
 // FIXME: check types and grouping of constants

diff --git a/src/core/sys/windows/winldap.d b/src/core/sys/windows/winldap.d
@@ -10,6 +10,8 @@
 module core.sys.windows.winldap;
 version (Windows):
 
+version (ANSI) {} else version = Unicode;
+
 /* Comment from MinGW
   winldap.h - Header file for the Windows LDAP API
 

diff --git a/src/core/sys/windows/winnetwk.d b/src/core/sys/windows/winnetwk.d
@@ -9,6 +9,8 @@
  */
 module core.sys.windows.winnetwk;
 version (Windows):
+
+version (ANSI) {} else version = Unicode;
 pragma(lib, "mpr");
 
 private import core.sys.windows.winbase, core.sys.windows.winerror, core.sys.windows.winnt;

diff --git a/src/core/sys/windows/winnls.d b/src/core/sys/windows/winnls.d
@@ -9,6 +9,8 @@
  */
 module core.sys.windows.winnls;
 version (Windows):
+
+version (ANSI) {} else version = Unicode;
 pragma(lib, "kernel32");
 
 private import core.sys.windows.basetsd, core.sys.windows.w32api, core.sys.windows.winbase, core.sys.windows.windef;

diff --git a/src/core/sys/windows/winnt.d b/src/core/sys/windows/winnt.d
@@ -9,6 +9,8 @@
 module core.sys.windows.winnt;
 version (Windows):
 
+version (ANSI) {} else version = Unicode;
+
 public import core.sys.windows.basetsd, core.sys.windows.windef, core.sys.windows.winerror;
 private import core.sys.windows.w32api;
 

diff --git a/src/core/sys/windows/winreg.d b/src/core/sys/windows/winreg.d
@@ -9,6 +9,8 @@
  */
 module core.sys.windows.winreg;
 version (Windows):
+
+version (ANSI) {} else version = Unicode;
 pragma(lib, "advapi32");
 
 private import core.sys.windows.w32api, core.sys.windows.winbase, core.sys.windows.windef;

diff --git a/src/core/sys/windows/winspool.d b/src/core/sys/windows/winspool.d
@@ -8,6 +8,8 @@
  */
 module core.sys.windows.winspool;
 version (Windows):
+
+version (ANSI) {} else version = Unicode;
 pragma(lib, "winspool");
 
 private import core.sys.windows.w32api, core.sys.windows.windef, core.sys.windows.wingdi;

diff --git a/src/core/sys/windows/winsvc.d b/src/core/sys/windows/winsvc.d
@@ -9,6 +9,8 @@
  */
 module core.sys.windows.winsvc;
 version (Windows):
+
+version (ANSI) {} else version = Unicode;
 pragma(lib, "advapi32");
 
 private import core.sys.windows.w32api, core.sys.windows.windef;

diff --git a/src/core/sys/windows/winuser.d b/src/core/sys/windows/winuser.d
@@ -8,6 +8,8 @@
  */
 module core.sys.windows.winuser;
 version (Windows):
+
+version (ANSI) {} else version = Unicode;
 pragma(lib, "user32");
 
 // Conversion Notes:

diff --git a/src/core/sys/windows/winver.d b/src/core/sys/windows/winver.d
@@ -9,6 +9,8 @@
  */
 module core.sys.windows.winver;
 version (Windows):
+
+version (ANSI) {} else version = Unicode;
 pragma(lib, "version");
 
 private import core.sys.windows.windef;

diff --git a/src/core/sys/windows/wtsapi32.d b/src/core/sys/windows/wtsapi32.d
@@ -8,6 +8,8 @@
  */
 module core.sys.windows.wtsapi32;
 version (Windows):
+
+version (ANSI) {} else version = Unicode;
 pragma(lib, "wtsapi32");
 private import core.sys.windows.w32api;
 import core.sys.windows.windef;