diff --git a/gossipd/gossip_wire.csv b/gossipd/gossip_wire.csv
index 658f54681..e86f1260e 100644
--- a/gossipd/gossip_wire.csv
+++ b/gossipd/gossip_wire.csv
@@ -29,7 +29,8 @@ gossip_getroute_request,3006
 gossip_getroute_request,,source,struct pubkey
 gossip_getroute_request,,destination,struct pubkey
 gossip_getroute_request,,msatoshi,u64
-gossip_getroute_request,,riskfactor,u16
+# We don't pass doubles, so pass riskfactor * 1000000.
+gossip_getroute_request,,riskfactor_by_million,u64
 gossip_getroute_request,,final_cltv,u32
 gossip_getroute_request,,fuzz,double
 gossip_getroute_request,,num_excluded,u16
diff --git a/gossipd/gossipd.c b/gossipd/gossipd.c
index 735020228..556e12aed 100644
--- a/gossipd/gossipd.c
+++ b/gossipd/gossipd.c
@@ -1894,7 +1894,7 @@ static struct io_plan *getroute_req(struct io_conn *conn, struct daemon *daemon,
 	struct pubkey source, destination;
 	u64 msatoshi;
 	u32 final_cltv;
-	u16 riskfactor;
+	u64 riskfactor_by_million;
 	u32 max_hops;
 	u8 *out;
 	struct route_hop *hops;
@@ -1909,7 +1909,7 @@ static struct io_plan *getroute_req(struct io_conn *conn, struct daemon *daemon,
 	 * avoid being too predictable. */
 	if (!fromwire_gossip_getroute_request(msg, msg,
 					      &source, &destination,
-					      &msatoshi, &riskfactor,
+					      &msatoshi, &riskfactor_by_million,
 					      &final_cltv, &fuzz,
 					      &excluded,
 					      &max_hops))
@@ -1921,7 +1921,7 @@ static struct io_plan *getroute_req(struct io_conn *conn, struct daemon *daemon,
 
 	/* routing.c does all the hard work; can return NULL. */
 	hops = get_route(tmpctx, daemon->rstate, &source, &destination,
-			 msatoshi, riskfactor, final_cltv,
+			 msatoshi, riskfactor_by_million / 1000000.0, final_cltv,
 			 fuzz, pseudorand_u64(), excluded, max_hops);
 
 	out = towire_gossip_getroute_reply(NULL, hops);
diff --git a/lightningd/gossip_control.c b/lightningd/gossip_control.c
index 3fc0a18ff..1b2a9b30f 100644
--- a/lightningd/gossip_control.c
+++ b/lightningd/gossip_control.c
@@ -352,7 +352,8 @@ static struct command_result *json_getroute(struct command *cmd,
 	}
 
 	u8 *req = towire_gossip_getroute_request(cmd, source, destination,
-						 *msatoshi, *riskfactor * 1000,
+						 *msatoshi,
+						 *riskfactor * 1000000.0,
 						 *cltv, fuzz,
 						 excluded,
 						 *max_hops);