diff --git a/Makefile b/Makefile
index e04f5f4..24f57ff 100644
--- a/Makefile
+++ b/Makefile
@@ -13,6 +13,9 @@ CC = gcc
 OPT = -Wall -g -DDEBUG_LEVEL=1 -DMUST_ABORT
 CC = gcc
 
+bubulles.a:	bubulles.o
+	ar r $@ $?
+
 bubulles.o:	bubulles.c bubulles.h Makefile
 	$(CC) $(OPT) -c $<