diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index d962f67c95ae..e60c64d18586 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -3903,6 +3903,8 @@ static void run_state_machine(struct tcpm_port *port)
 		port->potential_contaminant = ((port->enter_state == SRC_ATTACH_WAIT &&
 						port->state == SRC_UNATTACHED) ||
 					       (port->enter_state == SNK_ATTACH_WAIT &&
+						port->state == SNK_UNATTACHED) ||
+					       (port->enter_state == SNK_DEBOUNCED &&
 						port->state == SNK_UNATTACHED));
 
 	port->enter_state = port->state;