diff --git a/Makefile b/Makefile
index 9ba6906..3a8598a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,5 @@
 
+CFLAGS = -Wall -O2
 OBJS = sha256.o nostril.o
 HEADERS = hex.h random.h config.h sha256.h
 
@@ -6,10 +7,10 @@ all: nostril
 
 %.o: %.c config.h
 	@echo "cc $<"
-	@$(CC) -c $< -o $@
+	@$(CC) $(CFLAGS) -c $< -o $@
 
 nostril: $(HEADERS) $(OBJS)
-	$(CC) $(OBJS) -lsecp256k1 -o $@ 
+	$(CC) $(CFLAGS) $(OBJS) -lsecp256k1 -o $@ 
 
 config.h: configurator                                                          
 	./configurator > $@                                                     
diff --git a/nostril.c b/nostril.c
index 53e6af4..8d334ec 100644
--- a/nostril.c
+++ b/nostril.c
@@ -203,7 +203,6 @@ static int create_key(secp256k1_context *ctx, struct key *key, unsigned char sec
 static int decode_key(secp256k1_context *ctx, const char *secstr, struct key *key)
 {
 	unsigned char seckey[32];
-	int ok;
 
 	if (!hex_decode(secstr, strlen(secstr), seckey, 32)) {
 		fprintf(stderr, "could not hex decode secret key\n");
@@ -379,7 +378,6 @@ int main(int argc, const char *argv[])
 	struct nostr_event ev = {0};
 	struct key key;
         secp256k1_context *ctx;
-	int ok;
 
 	if (argc < 2)
 		usage();