diff --git a/gcc/config/i386/osfrose.h b/gcc/config/i386/osfrose.h
index 6a99f26f25d..07a01a83688 100644
--- a/gcc/config/i386/osfrose.h
+++ b/gcc/config/i386/osfrose.h
@@ -43,8 +43,10 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
      { "no-half-pic",	-MASK_HALF_PIC},				\
      { "debugb",	 MASK_HALF_PIC_DEBUG},
 
-/* Undefine this now, because bsd386.h tests it.  */
-#undef NO_UNDERSCORES
+/* Put leading underscores in front of names. */
+#undef	NO_UNDERSCORES
+#undef	ASM_OUTPUT_LABELREF
+#define ASM_OUTPUT_LABELREF(FILE,NAME) fprintf (FILE, "_%s", NAME)
 
 /* Prefix that appears before all global/static identifiers, except for
    temporary labels.  */