--- cipher/Makefile.am
+++ cipher/Makefile.am
@@ -71,3 +71,10 @@
 
 tiger.lo: $(srcdir)/tiger.c
 	`echo $(LTCOMPILE) -c $(srcdir)/tiger.c | sed -e 's/-O[2-9s]*/-O1/g' `
+
+# We need to build ac.c with -fno-strict-aliasing
+ac.o: $(srcdir)/ac.c
+	`echo $(COMPILE) -fno-strict-aliasing -c $(srcdir)/ac.c`
+
+ac.lo: $(srcdir)/ac.c
+	`echo $(LTCOMPILE) -fno-strict-aliasing -c $(srcdir)/ac.c`