diff --git a/putty.h b/putty.h
index 964b4b23..d53eaca0 100644
--- a/putty.h
+++ b/putty.h
@@ -635,7 +635,6 @@ void free_ctx(Context);
 void palette_set(void *frontend, int, int, int, int);
 void palette_reset(void *frontend);
 int palette_get(void *frontend, int n, int *r, int *g, int *b);
-void write_aclip(void *frontend, char *, int, int);
 void write_clip(void *frontend, wchar_t *, int *, truecolour *, int, int);
 void optimised_move(void *frontend, int, int, int);
 void set_raw_mouse_mode(void *frontend, int);
diff --git a/windows/winstuff.h b/windows/winstuff.h
index 546c273b..0b535822 100644
--- a/windows/winstuff.h
+++ b/windows/winstuff.h
@@ -242,6 +242,13 @@ void quit_help(HWND hwnd);
 GLOBAL Terminal *term;
 GLOBAL void *logctx;
 
+/*
+ * Windows-specific clipboard helper function shared with windlg.c,
+ * which takes the data string in the system code page instead of
+ * Unicode.
+ */
+void write_aclip(void *frontend, char *, int, int);
+
 #define WM_NETEVENT  (WM_APP + 5)
 
 /*