diff --git a/current.txt b/current.txt
index 2ad1e09f66..a3ff61e8f2 100644
--- a/current.txt
+++ b/current.txt
@@ -220,3 +220,6 @@ c3354ab0d381a236c12dc486ad4b6bec28c979d26748b4661f12ede36f392808 android.hardwar
 b18caefefcc765092412285d776234fcf213b73bdf07ae1b67a5f71b2d2464e3 android.hardware.wifi.offload@1.0::types
 c26473e2e4a00af43e28a0ddf9002e5062a7d0940429e5efb6e5513a8abcb75c android.hardware.wifi@1.1::IWifi
 b056e1defab4071584214584057d0bc73a613081bf1152590549649d4582c13c android.hardware.wifi@1.1::IWifiChip
+
+# HALs released in Android O MR1 (Final Set)
+0a159f81359cd4f71bbe00972ee8403ea79351fb7c0cd48be72ebb3e424dbaef android.hardware.radio@1.0::types
diff --git a/radio/1.0/types.hal b/radio/1.0/types.hal
index c5d7f8aa04..4d22bc0f27 100644
--- a/radio/1.0/types.hal
+++ b/radio/1.0/types.hal
@@ -1507,8 +1507,8 @@ struct CellIdentityGsm {
     int32_t lac;                          // 16-bit Location Area Code, 0..65535, INT_MAX if unknown
     int32_t cid;                          // 16-bit GSM Cell Identity described in
                                           // TS 27.007, 0..65535, INT_MAX if unknown
-    int32_t arfcn;                        // 16-bit GSM Absolute RF channel number, INT_MAX if
-                                          // unknown
+    int32_t arfcn;                        // 16-bit GSM Absolute RF channel number; this value must
+                                          // be valid
     uint8_t bsic;                         // 6-bit Base Station Identity Code, 0xFF if unknown
 };
 
@@ -1520,9 +1520,9 @@ struct CellIdentityWcdma {
     int32_t cid;                          // 28-bit UMTS Cell Identity described in
                                           // TS 25.331, 0..268435455, INT_MAX if unknown
     int32_t psc;                          // 9-bit UMTS Primary Scrambling Code described in
-                                          // TS 25.331, 0..511, INT_MAX if unknown
-    int32_t uarfcn;                       // 16-bit UMTS Absolute RF Channel Number, INT_MAX if
-                                          // unknown
+                                          // TS 25.331, 0..511; this value must be valid
+    int32_t uarfcn;                       // 16-bit UMTS Absolute RF Channel Number; this value must
+                                          // be valid
 };
 
 struct CellIdentityCdma {
@@ -1547,10 +1547,10 @@ struct CellIdentityLte {
                                           // unknown
     int32_t ci;                           // 28-bit Cell Identity described in TS TS 27.007, INT_MAX
                                           // if unknown
-    int32_t pci;                          // physical cell id 0..503, INT_MAX if unknown
+    int32_t pci;                          // physical cell id 0..503; this value must be valid
     int32_t tac;                          // 16-bit tracking area code, INT_MAX if unknown
-    int32_t earfcn;                       // 18-bit LTE Absolute RC Channel Number, INT_MAX if
-                                          // unknown
+    int32_t earfcn;                       // 18-bit LTE Absolute RF Channel Number; this value must
+                                          // be valid
 };
 
 struct CellIdentityTdscdma {