diff --git a/op25/gr-op25/lib/value_string.cc b/op25/gr-op25/lib/value_string.cc
index 8f079b9..60449bc 100644
--- a/op25/gr-op25/lib/value_string.cc
+++ b/op25/gr-op25/lib/value_string.cc
@@ -82,7 +82,7 @@ const value_string ALGIDS[] = {
    { 0xAC, "Motorola Assigned - Unknown" },
    { 0xAD, "Motorola Assigned - Unknown" },
    { 0xAE, "Motorola Assigned - Unknown" },
-   { 0xAF, "Motorola Assigned - Unknown" },
+   { 0xAF, "Motorola Assigned - AES-256-GCM" },
    { 0xB0, "Motorola DVP"},
 };
 const size_t ALGIDS_SZ = sizeof(ALGIDS) / sizeof(ALGIDS[0]);