diff --git a/src/devices/machine/ncr53c90.cpp b/src/devices/machine/ncr53c90.cpp
index cc9ed8fe1da..64c74968ed9 100644
--- a/src/devices/machine/ncr53c90.cpp
+++ b/src/devices/machine/ncr53c90.cpp
@@ -961,6 +961,7 @@ void ncr53c90_device::start_command()
 
 	case CD_DISABLE_SEL:
 		LOGMASKED(LOG_COMMAND, "Disable selection/reselection\n");
+		function_complete();
 		command_pop_and_chain();
 		break;