diff --git a/board/fizz/board.h b/board/fizz/board.h
index 6b1c27d020..93dce5bd49 100644
--- a/board/fizz/board.h
+++ b/board/fizz/board.h
@@ -67,7 +67,6 @@
 
 /* Charger */
 #define CONFIG_CHARGE_MANAGER
-#undef  CONFIG_CHARGE_MANAGER_SAFE_MODE
 
 #define CONFIG_CHARGER_LIMIT_POWER_THRESH_CHG_MW 50000
 
diff --git a/board/fizz/usb_pd_policy.c b/board/fizz/usb_pd_policy.c
index ee853f0ab6..39e47dd895 100644
--- a/board/fizz/usb_pd_policy.c
+++ b/board/fizz/usb_pd_policy.c
@@ -219,6 +219,16 @@ int pd_custom_vdm(int port, int cnt, uint32_t *payload,
 	return 0;
 }
 
+/*
+ * Since fizz has no battery, it must source all of its power from either
+ * USB-C or the barrel jack (preferred). Fizz operates in continuous safe
+ * mode (charge_manager_leave_safe_mode() will never be called), which
+ * modifies port / ILIM selection as follows:
+ *
+ * - Dual-role / dedicated capability of the port partner is ignored.
+ * - Charge ceiling on PD voltage transition is ignored.
+ * - CHARGE_PORT_NONE will never be selected.
+ */
 static void board_charge_manager_init(void)
 {
 	int input_voltage;