diff --git a/src/main/java/io/github/dsheirer/module/decode/p25/phase1/message/tsbk/Opcode.java b/src/main/java/io/github/dsheirer/module/decode/p25/phase1/message/tsbk/Opcode.java
index a2f2f446..64fbf29b 100644
--- a/src/main/java/io/github/dsheirer/module/decode/p25/phase1/message/tsbk/Opcode.java
+++ b/src/main/java/io/github/dsheirer/module/decode/p25/phase1/message/tsbk/Opcode.java
@@ -324,7 +324,7 @@ public enum Opcode
     public static List<Opcode> getUngrouped()
     {
         List<Opcode> ungrouped = new ArrayList<>();
-        for(Opcode opcode: ungrouped)
+        for(Opcode opcode: Opcode.values())
         {
             if(!opcode.isGrouped())
             {