diff --git a/src/common/memory.cpp b/src/common/memory.cpp
index f14989ad3b..2795070054 100644
--- a/src/common/memory.cpp
+++ b/src/common/memory.cpp
@@ -321,7 +321,7 @@ void wxMemStruct::PrintNode ()
       msg += wxT("object");
 
     wxString msg2;
-    msg2.Printf(wxT(" at 0x%lX, size %d"), (long)GetActualData(), (int)RequestSize());
+    msg2.Printf(wxT(" at %#zx, size %d"), wxPtrToUInt(GetActualData()), (int)RequestSize());
     msg += msg2;
 
     wxLogMessage(msg);
@@ -334,7 +334,7 @@ void wxMemStruct::PrintNode ()
       msg.Printf(wxT("%s(%d): "), m_fileName, (int)m_lineNum);
     msg += wxT("non-object data");
     wxString msg2;
-    msg2.Printf(wxT(" at 0x%lX, size %d\n"), (long)GetActualData(), (int)RequestSize());
+    msg2.Printf(wxT(" at %#zx, size %d\n"), wxPtrToUInt(GetActualData()), (int)RequestSize());
     msg += msg2;
 
     wxLogMessage(msg);
@@ -367,7 +367,7 @@ void wxMemStruct::Dump ()
       msg += wxT("unknown object class");
 
     wxString msg2;
-    msg2.Printf(wxT(" at 0x%lX, size %d"), (long)GetActualData(), (int)RequestSize());
+    msg2.Printf(wxT(" at %#zx, size %d"), wxPtrToUInt(GetActualData()), (int)RequestSize());
     msg += msg2;
 
     wxDebugContext::OutputDumpLine(msg.c_str());
@@ -379,7 +379,7 @@ void wxMemStruct::Dump ()
       msg.Printf(wxT("%s(%d): "), m_fileName, (int)m_lineNum);
 
     wxString msg2;
-    msg2.Printf(wxT("non-object data at 0x%lX, size %d"), (long)GetActualData(), (int)RequestSize() );
+    msg2.Printf(wxT("non-object data at %#zx, size %d"), wxPtrToUInt(GetActualData()), (int)RequestSize() );
     msg += msg2;
     wxDebugContext::OutputDumpLine(msg.c_str());
   }