diff --git a/tests/rigmem.c b/tests/rigmem.c
index 4314e1c2a..15154db0a 100644
--- a/tests/rigmem.c
+++ b/tests/rigmem.c
@@ -187,7 +187,6 @@ int main(int argc, char *argv[])
             break;
 
         default:
-            fprintf(stderr, "Unknown option '%c'\n", c);
             usage();    /* unknown option? */
             exit(1);
         }