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-rw-r--r--include/ruby/win32.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/include/ruby/win32.h b/include/ruby/win32.h
index 47f68b8cb2..68b8db73e6 100644
--- a/include/ruby/win32.h
+++ b/include/ruby/win32.h
@@ -403,8 +403,9 @@ __declspec(dllimport) extern int finite(double);
#define SUFFIX
-extern int rb_w32_ftruncate(int fd, off_t length);
-extern int rb_w32_truncate(const char *path, off_t length);
+extern int rb_w32_ftruncate(int fd, off_t length);
+extern int rb_w32_truncate(const char *path, off_t length);
+extern int rb_w32_utruncate(const char *path, off_t length);
#undef HAVE_FTRUNCATE
#define HAVE_FTRUNCATE 1