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-rw-r--r--src/emu/fileio.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/emu/fileio.h b/src/emu/fileio.h
index 7c0f4a23b92..9a844feac20 100644
--- a/src/emu/fileio.h
+++ b/src/emu/fileio.h
@@ -141,7 +141,7 @@ UINT32 mame_fwrite(mame_file *file, const void *buffer, UINT32 length);
int mame_fputs(mame_file *f, const char *s);
/* printf-style text write to a file */
-int CLIB_DECL mame_fprintf(mame_file *f, const char *fmt, ...);
+int CLIB_DECL mame_fprintf(mame_file *f, const char *fmt, ...) ATTR_PRINTF(2,3);