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-rw-r--r--include/ruby/win32.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/ruby/win32.h b/include/ruby/win32.h
index 3b7b113133..43036b8dc8 100644
--- a/include/ruby/win32.h
+++ b/include/ruby/win32.h
@@ -240,6 +240,7 @@ extern char * rb_w32_getenv(const char *);
extern int rb_w32_rename(const char *, const char *);
extern char **rb_w32_get_environ(void);
extern void rb_w32_free_environ(char **);
+extern int rb_w32_map_errno(DWORD);
#define vsnprintf(s,n,f,l) rb_w32_vsnprintf(s,n,f,l)
#define snprintf rb_w32_snprintf