1 files changed, 1 insertions, 1 deletions

diff --git a/arch/sparc/include/asm/oplib_32.h b/arch/sparc/include/asm/oplib_32.h
index 27517879a6c2..c72f3045820c 100644
--- a/arch/sparc/include/asm/oplib_32.h
+++ b/arch/sparc/include/asm/oplib_32.h
@@ -94,7 +94,7 @@ extern int prom_getprev(void);
 extern void prom_console_write_buf(const char *buf, int len);
 
 /* Prom's internal routines, don't use in kernel/boot code. */
-extern void prom_printf(const char *fmt, ...);
+extern __printf(1, 2) void prom_printf(const char *fmt, ...);
 extern void prom_write(const char *buf, unsigned int len);
 
 /* Multiprocessor operations... */