diff --git a/plugins/pay.c b/plugins/pay.c
index 0e309b33b..fc39b8bb3 100644
--- a/plugins/pay.c
+++ b/plugins/pay.c
@@ -399,11 +399,10 @@ static void add_new_entry(struct json_stream *ret,
 	/* This is only tallied for pending and successful payments, not
 	 * failures. */
 	if (pm->amount != NULL && pm->num_nonfailed_parts > 0)
-		json_add_string(ret, "amount_msat",
-				fmt_amount_msat(tmpctx, *pm->amount));
+		json_add_amount_msat_only(ret, "amount_msat", *pm->amount);
 
-	json_add_string(ret, "amount_sent_msat",
-			fmt_amount_msat(tmpctx, pm->amount_sent));
+	json_add_amount_msat_only(ret, "amount_sent_msat",
+				  pm->amount_sent);
 
 	if (pm->num_nonfailed_parts > 1)
 		json_add_u64(ret, "number_of_parts",
diff --git a/plugins/spender/multifundchannel.c b/plugins/spender/multifundchannel.c
index 4b9c1c6c3..e67baed0e 100644
--- a/plugins/spender/multifundchannel.c
+++ b/plugins/spender/multifundchannel.c
@@ -1117,8 +1117,8 @@ fundchannel_start_dest(struct multifundchannel_destination *dest)
 		json_add_string(req->js, "feerate", mfc->feerate_str);
 
 	json_add_bool(req->js, "announce", dest->announce);
-	json_add_string(req->js, "push_msat",
-			fmt_amount_msat(tmpctx, dest->push_msat));
+	json_add_amount_msat_only(req->js, "push_msat", dest->push_msat);
+
 	if (dest->close_to_str)
 		json_add_string(req->js, "close_to", dest->close_to_str);