diff --git a/src/smblib/smblib.h b/src/smblib/smblib.h
index 88b6de5c3c913cbbb164cb71e05cdccf627f7205..afe926a4b5cd9ea8225b7dab58603466cbfa0313 100644
--- a/src/smblib/smblib.h
+++ b/src/smblib/smblib.h
@@ -82,6 +82,8 @@
 
 #define GETMSGTXT_TAILS 	1			/* Get message tail(s) too */
 
+#define SMB_IS_OPEN(smb)	(smb->shd_fp!=NULL)
+
 #ifdef __cplusplus
 extern "C" {
 #endif