diff --git a/lib/Makefile b/lib/Makefile
index e3a2247..c137b53 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -13,6 +13,6 @@ libaboot.a: vsprintf.o memcpy.o memset.o string.o _setjmp.o \
 	__remlu.o
-	ar cru $@ $?
+	$(AR) cru $@ $?
 else
 libaboot.a: isolib.o
-	ar cru $@ $?
+	$(AR) cru $@ $?
 endif