diff --git a/dnn/lpcnet_demo.c b/dnn/lpcnet_demo.c
index aad31190..e1aa23c0 100644
--- a/dnn/lpcnet_demo.c
+++ b/dnn/lpcnet_demo.c
@@ -90,7 +90,7 @@ void free_blob(unsigned char *blob, int len) {
 
 void usage(void) {
     fprintf(stderr, "usage: lpcnet_demo -features <input.pcm> <features.f32>\n");
-    fprintf(stderr, "       lpcnet_demo -fargan_synthesis <features.f32> <output.pcm>\n");
+    fprintf(stderr, "       lpcnet_demo -fargan-synthesis <features.f32> <output.pcm>\n");
     fprintf(stderr, "       lpcnet_demo -addlpc <features_without_lpc.f32> <features_with_lpc.lpc>\n\n");
     fprintf(stderr, "  plc_options:\n");
     fprintf(stderr, "       causal:       normal (causal) PLC\n");