diff --git a/Event/xAOD/xAODCore/Root/AuxContainerBase.cxx b/Event/xAOD/xAODCore/Root/AuxContainerBase.cxx
index ab5fe6141ef8eb5c948a6e155ce2fb24f3aa6f39..ed295fc46c906542614c445ed3f2c3ea20da3183 100644
--- a/Event/xAOD/xAODCore/Root/AuxContainerBase.cxx
+++ b/Event/xAOD/xAODCore/Root/AuxContainerBase.cxx
@@ -18,7 +18,6 @@
 #include "xAODCore/tools/ReadStats.h"
 
 #include "CxxUtils/checker_macros.h"
-#include "CxxUtils/FloatCompressor.h"
 
 using namespace std;
 
@@ -26,7 +25,6 @@ namespace xAOD {
 
    AuxContainerBase::AuxContainerBase( bool allowDynamicVars )
       : SG::IAuxStore(),
-        m_compression(),
         m_auxids(), m_vecs(), m_store( 0 ), m_storeIO( 0 ),
         m_ownsStore( true ),
         m_locked( false ),
@@ -54,7 +52,6 @@ namespace xAOD {
    {
       // Keep the source unmutable during copy
       guard_t guard( parent.m_mutex );
-      m_compression = parent.m_compression;
       m_name = parent.m_name;
 
       // Unfortunately the dynamic variables can not be copied this easily...
@@ -74,7 +71,6 @@ namespace xAOD {
    ///
    AuxContainerBase::AuxContainerBase( SG::IAuxStore* store )
       : SG::IAuxStore(),
-        m_compression(),
         m_auxids(), m_vecs(),
         m_store( store ),
         m_storeIO( 0 ), m_ownsStore( false ),
@@ -113,7 +109,6 @@ namespace xAOD {
 
       // Keep the objects locked during copy
       std::scoped_lock  lck{m_mutex, rhs.m_mutex};
-      m_compression = rhs.m_compression;
 
       // Clean up after the old dynamic store:
       if( m_store && m_ownsStore ) {
diff --git a/Event/xAOD/xAODCore/xAODCore/AuxContainerBase.h b/Event/xAOD/xAODCore/xAODCore/AuxContainerBase.h
index ee12ff2011ca16b6ebc9dacadea9c0c8142121ab..addbeec2016ce2015172a8903dba61e2da66d07c 100644
--- a/Event/xAOD/xAODCore/xAODCore/AuxContainerBase.h
+++ b/Event/xAOD/xAODCore/xAODCore/AuxContainerBase.h
@@ -22,7 +22,6 @@
 
 // Local include(s):
 #include "xAODCore/AuxSelection.h"
-#include "xAODCore/AuxCompression.h"
 
 // Forward declaration(s):
 namespace SG {
@@ -197,8 +196,6 @@ namespace xAOD {
       void regAuxVar1( auxid_t auxid, const std::string& name,
                        CONT& vec );
 
-      /// Attributes compression implementation
-      AuxCompression  m_compression;
       /// Internal list of all available variables
       auxid_set_t m_auxids;
       /// Internal list of all managed variables