diff --git a/Makefile b/Makefile
index 46865c6..411ab92 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ include config.mk
 all:
 	$(CC) $(CFLAGS) $(LDFLAGS) -c src/ecrypt.c -o src/ecrypt.o
 	$(CC) $(CFLAGS) $(LDFLAGS) -c src/checkkey.c -o src/checkkey.o
-	$(CC) $(CFLAGS) $(LDFLAGS) -c src/genkey.c -o src/genkey.c
+	$(CC) $(CFLAGS) $(LDFLAGS) -c src/genkey.c -o src/genkey.o
 	$(CC) $(CFLAGS) $(LDFLAGS) -o src/ecrypt src/ecrypt.o src/checkkey.o src/genkey.o
 
 install:
diff --git a/src/checkkey.c b/src/checkkey.c
index f11aa89..30f1008 100644
--- a/src/checkkey.c
+++ b/src/checkkey.c
@@ -12,11 +12,6 @@ checkkey(int argc, char *argv[])
 	int cnt2 = 0;
 	int flg = 0;
 
-	if (argv < 3) {
-		printf("usage: %s [-g] [-c] [-h] [-v] KEYFILE KEY\n", argv[0]);
-		return 1;
-	}
-
 	key1 = fopen(argv[1], "r");
 	if (key1 == NULL) {
 		printf("cannot open local first key file\n");
@@ -62,9 +57,3 @@ checkkey(int argc, char *argv[])
 
 	return 0;
 }
-
-int
-main(int argc, char *argv[])
-{
-	checkkey(argc, argv);
-}