diff --git a/src/main.c b/src/main.c
index b1c9fff..a2f6431 100644
--- a/src/main.c
+++ b/src/main.c
@@ -40,7 +40,7 @@ int main(int argc, char **argv) {
     }
 
     if (cfsetspeed(&t_options, speed_from_string(speed)) < 0) {
-        fprintf(stderr, "Failed to set port speed.\n", speed);
+        fprintf(stderr, "Failed to set port speed.\n");
         return 2;
     }