diff --git a/include/xrpl/protocol/Sponsor.h b/include/xrpl/protocol/Sponsor.h
deleted file mode 100644
index 2f95fb8398..0000000000
--- a/include/xrpl/protocol/Sponsor.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#pragma once
-
-#include <xrpl/protocol/AccountID.h>
-#include <xrpl/protocol/HashPrefix.h>
-#include <xrpl/protocol/STVector256.h>
-#include <xrpl/protocol/Serializer.h>
-
-namespace xrpl {
-
-inline void
-addSerializeSponsorData(Serializer& msg, AccountID const& sponsorID, std::uint32_t const& flags)
-{
-    msg.addBitString(sponsorID);
-    msg.add32(flags);
-}
-
-}  // namespace xrpl
diff --git a/src/test/jtx/impl/sponsor.cpp b/src/test/jtx/impl/sponsor.cpp
index db3caf56cf..59adb58f03 100644
--- a/src/test/jtx/impl/sponsor.cpp
+++ b/src/test/jtx/impl/sponsor.cpp
@@ -2,7 +2,6 @@
 #include <test/jtx/utility.h>
 
 #include <xrpl/protocol/Sign.h>
-#include <xrpl/protocol/Sponsor.h>
 #include <xrpl/protocol/TxFlags.h>
 #include <xrpl/protocol/jss.h>