diff --git a/ChangeLog b/ChangeLog
index eda55cf57..796656601 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -48,6 +48,7 @@
      less racy and (hopefully) more reliable on slow hardware.
  - [Makefile umac.c] Add special-case target to build umac128.o.
  - [umac.c] Enforce allowed umac output sizes.  From djm@.
+ - [Makefile.in] "Using $< in a non-suffix rule context is a GNUmake idiom".
 
 20120917
  - (dtucker) OpenBSD CVS Sync
diff --git a/Makefile.in b/Makefile.in
index a0dc5dcf7..e4f9ee194 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -1,4 +1,4 @@
-# $Id: Makefile.in,v 1.327 2012/10/05 01:38:25 dtucker Exp $
+# $Id: Makefile.in,v 1.328 2012/10/05 05:41:07 dtucker Exp $
 
 # uncomment if you run a non bourne compatable shell. Ie. csh
 #SHELL = @SH@
@@ -197,7 +197,7 @@ moduli:
 
 # special case target for umac128
 umac128.o:	umac.c
-	$(CC) $(CFLAGS) $(CPPFLAGS) -o umac128.o -c $< \
+	$(CC) $(CFLAGS) $(CPPFLAGS) -o umac128.o -c $(srcdir)/umac.c \
 	    -DUMAC_OUTPUT_LEN=16 -Dumac_new=umac128_new \
 	    -Dumac_update=umac128_update -Dumac_final=umac128_final \
 	    -Dumac_delete=umac128_delete