diff --git a/src/anchor_pkg/anchor_pkg/connector.py b/src/anchor_pkg/anchor_pkg/connector.py
index 14a9065..d2a6bb5 100644
--- a/src/anchor_pkg/anchor_pkg/connector.py
+++ b/src/anchor_pkg/anchor_pkg/connector.py
@@ -372,10 +372,10 @@ class CANConnector(Connector):
             case 2:
                 data_type = 1
                 data = struct.pack(">ff", *msg.data)
-            case 3 | 4:  # 3 gets padded and is treated as 4
+            case 3 | 4:  # 3 gets treated as 4
                 data_type = 2
-                # pad till we have 4 otherwise struct.pack will freak out
-                msg.data.append(0)
+                if data_len == 3:
+                    msg.data.append(0)
                 msg.data = msg.data[:4]
                 data = struct.pack(">hhhh", *[int(x) for x in msg.data])
             case _: