--- Libc/Libc-391/ppc/string/Makefile.inc
+++ Libc/Libc-498/ppc/string/Makefile.inc
@@ -7,6 +7,10 @@
 MDSRCS +=	\
      bcopy.s	\
      bzero.s	\
+     ffs.s	\
+     ffsl.s	\
+     fls.s	\
+     flsl.s	\
      memset.s   \
      memcmp.s	\
      strcat.s	\