diff --git a/src/mm-port-probe.c b/src/mm-port-probe.c
index e955a97e..ed7d36ab 100644
--- a/src/mm-port-probe.c
+++ b/src/mm-port-probe.c
@@ -1083,6 +1083,9 @@ serial_probe_at (MMPortProbe *self)
 }
 
 static const MMPortProbeAtCommand at_probing[] = {
+    { "AT",  3, mm_port_probe_response_processor_is_at },
+    { "AT",  3, mm_port_probe_response_processor_is_at },
+    { "AT",  3, mm_port_probe_response_processor_is_at },
     { "AT",  3, mm_port_probe_response_processor_is_at },
     { "AT",  3, mm_port_probe_response_processor_is_at },
     { "AT",  3, mm_port_probe_response_processor_is_at },