diff --git a/configure b/configure
index a2902e6c6..cde3b8e37 100755
--- a/configure
+++ b/configure
@@ -398,10 +398,11 @@ int main(void)
 {
 	crypto_secretstream_xchacha20poly1305_state crypto_state;
 	unsigned char header[crypto_secretstream_xchacha20poly1305_HEADERBYTES];
-	unsigned char data[] = { 1, 2, 3 };
+	unsigned char key[crypto_secretstream_xchacha20poly1305_KEYBYTES];
 
+	crypto_secretstream_xchacha20poly1305_keygen(key);
 	crypto_secretstream_xchacha20poly1305_init_push(&crypto_state, header,
-	                                                data);
+	                                                key);
 	printf("%p\n", crypto_aead_chacha20poly1305_ietf_encrypt);
 	printf("%d\n", crypto_aead_chacha20poly1305_ietf_NPUBBYTES);
 	return 0;