diff --git a/cipher/Makefile.am b/cipher/Makefile.am
index 95c4510..d43350c 100644
--- a/cipher/Makefile.am
+++ b/cipher/Makefile.am
@@ -112,7 +112,7 @@ gost-sb.h: gost-s-box
 	./gost-s-box $@
 
 gost-s-box: gost-s-box.c
-	$(CC_FOR_BUILD) -o $@ $(srcdir)/gost-s-box.c
+	$(CC_FOR_BUILD) $(CFLAGS) -o $@ $(srcdir)/gost-s-box.c
 
 
 if ENABLE_O_FLAG_MUNGING