diff --git a/command/payload_cmds.cpp b/command/payload_cmds.cpp
index 3b5b4f8..c32a510 100644
--- a/command/payload_cmds.cpp
+++ b/command/payload_cmds.cpp
@@ -101,6 +101,12 @@
 
     response->completionCode = IPMI_CC_OK;
 
+    if (inPayload.size() != sizeof(DeactivatePayloadRequest))
+    {
+        response->completionCode = IPMI_CC_REQ_DATA_LEN_INVALID;
+        return outPayload;
+    }
+
     // SOL is the payload currently supported for deactivation
     if (static_cast<uint8_t>(message::PayloadType::SOL) != request->payloadType)
     {
diff --git a/command/payload_cmds.hpp b/command/payload_cmds.hpp
index f916c11..b28392b 100644
--- a/command/payload_cmds.hpp
+++ b/command/payload_cmds.hpp
@@ -144,6 +144,7 @@
     uint8_t auxData1; //!< Auxiliary data 1
     uint8_t auxData2; //!< Auxiliary data 2
     uint8_t auxData3; //!< Auxiliary data 3
+    uint8_t auxData4; //!< Auxiliary data 4
 } __attribute__((packed));
 
 /** @struct DeactivatePayloadResponse