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-rw-r--r--include/ruby/defines.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/ruby/defines.h b/include/ruby/defines.h
index 2ef26d0da8..de0883d2c9 100644
--- a/include/ruby/defines.h
+++ b/include/ruby/defines.h
@@ -198,7 +198,7 @@ void xfree(void*);
#endif
#if defined(__sparc)
-void rb_sparc_flush_register_windows();
+void rb_sparc_flush_register_windows(void);
# define FLUSH_REGISTER_WINDOWS rb_sparc_flush_register_windows()
#elif defined(__ia64)
void *rb_ia64_bsp(void);