diff --git a/src/CxbxKrnl/CxbxKrnl.h b/src/CxbxKrnl/CxbxKrnl.h
index 8aecdd125..69725c515 100644
--- a/src/CxbxKrnl/CxbxKrnl.h
+++ b/src/CxbxKrnl/CxbxKrnl.h
@@ -62,6 +62,9 @@ extern "C" {
 /*! xbaddr is the type of a physical address */
 typedef uint32 xbaddr;
 
+/*! xbnullptr is the type of null pointer address*/
+#define xbnullptr nullptr
+
 #define XBADDR_BITS 32
 #define XBADDR_MAX UINT32_MAX