diff --git a/bin/mbus-serial-scan-secondary.c b/bin/mbus-serial-scan-secondary.c
index 61be9af..92dc3d3 100644
--- a/bin/mbus-serial-scan-secondary.c
+++ b/bin/mbus-serial-scan-secondary.c
@@ -137,7 +137,6 @@ main(int argc, char **argv)
     }
 
     (void) mbus_recv_frame(handle, &reply);
-    sleep(1);
 
     frame->control = MBUS_CONTROL_MASK_SND_NKE | MBUS_CONTROL_MASK_DIR_M2S;
     frame->address = 0xFF;
@@ -150,7 +149,6 @@ main(int argc, char **argv)
     }
 
     (void) mbus_recv_frame(handle, &reply);
-    sleep(1);
 
     mbus_scan_2nd_address_range(handle, 0, addr_mask);