diff --git a/dom/system/gonk/ril_consts.js b/dom/system/gonk/ril_consts.js
index 67bb4ff6ea6d..b2738846fb2b 100644
--- a/dom/system/gonk/ril_consts.js
+++ b/dom/system/gonk/ril_consts.js
@@ -2361,12 +2361,13 @@ this.RIL_DATACALL_AUTH_TO_GECKO = [
 ];
 
 this.GECKO_DATACALL_PDP_TYPE_IP = "IP";
+this.GECKO_DATACALL_PDP_TYPE_IPV4V6 = "IPV4V6";
 this.GECKO_DATACALL_PDP_TYPE_IPV6 = "IPV6";
 this.GECKO_DATACALL_PDP_TYPE_DEFAULT = GECKO_DATACALL_PDP_TYPE_IP;
 this.RIL_DATACALL_PDP_TYPES = [
   GECKO_DATACALL_PDP_TYPE_IP,
+  GECKO_DATACALL_PDP_TYPE_IPV4V6,
   GECKO_DATACALL_PDP_TYPE_IPV6,
-  // TODO: Bug 978711 - Support IPV4V6
 ];
 
 this.DATACALL_PROFILE_DEFAULT = 0;