diff --git a/programs/winedbg/debugger.h b/programs/winedbg/debugger.h
index ddac129bab5..a63e160fac3 100644
--- a/programs/winedbg/debugger.h
+++ b/programs/winedbg/debugger.h
@@ -39,7 +39,7 @@
 #include "oaidl.h"
 #include <wine/list.h>
 
-#define ADDRSIZE        (dbg_curr_process->be_cpu->pointer_size)
+#define ADDRSIZE        (dbg_curr_process ? dbg_curr_process->be_cpu->pointer_size : (int)sizeof(void*))
 #define ADDRWIDTH       (ADDRSIZE * 2)
 
 /* the debugger uses these exceptions for its internal use */