diff --git a/simulators/simts590.c b/simulators/simts590.c
index 4f6f350a1..ee2db59b6 100644
--- a/simulators/simts590.c
+++ b/simulators/simts590.c
@@ -115,7 +115,7 @@ int main(int argc, char *argv[])
         {
             printf("%s\n", buf);
             hl_usleep(mysleep * 1000);
-            pbuf = "RM5100000;";
+            pbuf = "RM50005;";
             WRITE(fd, pbuf, strlen(pbuf));
         }