diff --git a/src/protocols/pulses_arm.cpp b/src/protocols/pulses_arm.cpp
index b08f9d599..85a295b36 100644
--- a/src/protocols/pulses_arm.cpp
+++ b/src/protocols/pulses_arm.cpp
@@ -82,7 +82,7 @@ void setupPulses(unsigned int port)
       case PROTO_DSM2_LP45:
       case PROTO_DSM2_DSM2:
       case PROTO_DSM2_DSMX:
-        disable_dsm2();
+        disable_dsm2(port);
         break;
 #endif
       case PROTO_PPM: