Defines missing would segfault on --help when no sse mining is built in.
diff --git a/main.c b/main.c
index 6a29d56..f14f74e 100644
--- a/main.c
+++ b/main.c
@@ -154,9 +154,9 @@ int opt_vectors;
int opt_worksize;
int opt_scantime = 60;
static const bool opt_time = true;
-#if defined(__SSE4_1__)
+#if defined(WANT_X8664_SSE4) && defined(__SSE4_1__)
static enum sha256_algos opt_algo = ALGO_SSE4_64;
-#elif defined(__SSE2__)
+#elif defined(WANT_X8664_SSE2) && defined(__SSE2__)
static enum sha256_algos opt_algo = ALGO_SSE2_64;
#else
static enum sha256_algos opt_algo = ALGO_C;