diff --git a/include/freerdp/settings.h b/include/freerdp/settings.h
index 5e1909cb4..02b218894 100644
--- a/include/freerdp/settings.h
+++ b/include/freerdp/settings.h
@@ -166,6 +166,7 @@ typedef enum
 #define REDIRECTED_SESSIONID_FIELD_VALID 0x00000002
 #define REDIRECTED_SMARTCARD 0x00000040
 
+#define ServerSessionRedirectionVersionMask 0x0000003c
 #define REDIRECTION_VERSION1 0x00
 #define REDIRECTION_VERSION2 0x01
 #define REDIRECTION_VERSION3 0x02