diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..644537b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*~
+*.BAK
diff --git a/Makefile b/Makefile
index ec78759..0e957d5 100644
--- a/Makefile
+++ b/Makefile
@@ -25,7 +25,7 @@ test: testyield testdelay
 clean:
 	rm -f $(OBJS)
 	rm -f $(LIB)
-	rm -f testyield
+	rm -f testyield testdelay
 
 .PHONY: all clean test
 .SUFFIXES: .c .o