diff --git a/uppsrc/ide/Debuggers/Pdb.cpp b/uppsrc/ide/Debuggers/Pdb.cpp
index 82fabad52..a9fa8b6e2 100644
--- a/uppsrc/ide/Debuggers/Pdb.cpp
+++ b/uppsrc/ide/Debuggers/Pdb.cpp
@@ -125,6 +125,11 @@ bool Pdb::Create(One<Host> local, const String& exefile, const String& cmdline)
 #else
 	win64 = false;
 #endif
+
+	if(win64)
+		memory.SetTotal(I64(0xffffffffffff));
+	else
+		memory.SetTotal(0x80000000);
 	
 	CloseHandle(pi.hThread);
 
diff --git a/uppsrc/ide/Debuggers/Pdb.h b/uppsrc/ide/Debuggers/Pdb.h
index f4efcd7db..1ba33a072 100644
--- a/uppsrc/ide/Debuggers/Pdb.h
+++ b/uppsrc/ide/Debuggers/Pdb.h
@@ -58,7 +58,7 @@ struct Pdb : Debugger, ParentCtrl {
 
 		virtual int Byte(int64 addr)            { return pdb ? pdb->Byte((adr_t)addr) : 0; }
 
-		PdbHexView()                            { pdb = NULL; SetTotal(0x80000000); }
+		PdbHexView()                            { pdb = NULL; }
 	}
 	memory;