nDevs required for -n with usb
diff --git a/cgminer.c b/cgminer.c
index 39bb11a..7c1ff6a 100644
--- a/cgminer.c
+++ b/cgminer.c
@@ -92,9 +92,11 @@ int opt_bench_algo = -1;
static const bool opt_time = true;
unsigned long long global_hashrate;
+#if defined(HAVE_OPENCL) || defined(USE_USBUTILS)
+int nDevs;
+#endif
#ifdef HAVE_OPENCL
int opt_dynamic_interval = 7;
-int nDevs;
int opt_g_threads = 2;
int gpu_threads;
#ifdef USE_SCRYPT