diff --git a/Makefile b/Makefile
index c3b8d06..d43301d 100644
--- a/Makefile
+++ b/Makefile
@@ -2,18 +2,18 @@
 #	must be run with gnu make
 #
 
-CC = gcc
-
-CCOPT = -Wall -g 
+CC	= gcc
+CCOPT	= -Wall -g 
+CLIB	= core/libdd2m-core.a
 
 all:	essai fake-values
 
 # ---------------------------------------------
 
-essai:	essai.c  Makefile
-	gcc ${CCOPT} $< core/utils.o -o $@
+essai:	essai.c  Makefile $(CLIB)
+	$(CC) ${CCOPT} $< $(CLIB) -o $@
 
-fake-values:	fake-values.c  Makefile
-	gcc ${CCOPT} $< core/utils.o  -o $@
+fake-values:	fake-values.c  Makefile $(CLIB)
+	$(CC) ${CCOPT} $< $(CLIB)  -o $@
 
 # ---------------------------------------------
diff --git a/fake-values.c b/fake-values.c
index 1bb7ba8..88c3d4c 100644
--- a/fake-values.c
+++ b/fake-values.c
@@ -32,7 +32,7 @@ if (verbosity > 1) {
 	fprintf(stderr, "fake values - %s %s\n", __DATE__, __TIME__);
 	}
 
-printf("%.3f %d\n", dtime(), random1000(type));
+printf("%.3f %4d\n", dtime(), random1000(type));
 
 return 0;
 }