diff --git a/Makefile b/Makefile
index 524db11..b981306 100644
--- a/Makefile
+++ b/Makefile
@@ -74,6 +74,7 @@ dist:
 		$(PACKAGE)-$(VERSION)/tools/utils.c \
 		$(PACKAGE)-$(VERSION)/tools/Makefile \
 		$(PACKAGE)-$(VERSION)/tools/utils.sh \
+		$(PACKAGE)-$(VERSION)/tools/utilbox.h \
 		$(PACKAGE)-$(VERSION)/tools/project.conf \
 		$(PACKAGE)-$(VERSION)/Makefile \
 		$(PACKAGE)-$(VERSION)/COPYING \
diff --git a/tools/Makefile b/tools/Makefile
index 1be655f..251a125 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -22,10 +22,10 @@ utilbox_LDFLAGS = $(LDFLAGSF) $(LDFLAGS)
 utilbox: $(utilbox_OBJS)
 	$(CC) -o utilbox $(utilbox_OBJS) $(utilbox_LDFLAGS)
 
-utilbox.o: utilbox.c
+utilbox.o: utilbox.c utilbox.h
 	$(CC) $(utilbox_CFLAGS) -c utilbox.c
 
-utils.o: utils.c
+utils.o: utils.c utilbox.h
 	$(CC) $(utilbox_CFLAGS) -c utils.c
 
 clean:
diff --git a/tools/project.conf b/tools/project.conf
index c02cf6d..fc3a8db 100644
--- a/tools/project.conf
+++ b/tools/project.conf
@@ -1,8 +1,14 @@
 targets=utilbox
 cflags_force=-W
 cflags=-Wall -g -O2 -pedantic
-dist=Makefile,utils.sh
+dist=Makefile,utils.sh,utilbox.h
 
 [utilbox]
 type=binary
 sources=utilbox.c,utils.c
+
+[utilbox.c]
+depends=utilbox.h
+
+[utils.c]
+depends=utilbox.h