diff --git a/Makefile b/Makefile
--- a/Makefile
+++ b/Makefile
@@ -49,7 +49,10 @@
 	getpwnam_error \
 	xmlparser \
 	vector \
-	base10
+	base10 \
+	files \
+	fork \
+	duff
 
 .SUFFIXES: .c .cc .asm
 
@@ -265,6 +268,18 @@
 	@echo Linking $< ...
 	@$(CC) -lm -o $@ $<
 
+files: files.o
+	@echo Linking $< ...
+	@$(CC) -o $@ $<
+
+fork: fork.o
+	@echo Linking $< ...
+	@$(CC) -o $@ $<
+
+duff: duff.o
+	@echo Linking $< ...
+	@$(CC) -o $@ $<
+
 .PHONY: clean uninstall
 
 clean: