diff --git a/src/dbStatic/devSup.h b/src/dbStatic/devSup.h
index b68f96b87..66ef5c558 100644
--- a/src/dbStatic/devSup.h
+++ b/src/dbStatic/devSup.h
@@ -62,5 +62,6 @@ struct dset {	/* device support entry table */
 #define S_dev_badSignal     (M_devSup|17) /*Illegal signal*/
 #define S_dev_NoInit        (M_devSup|19) /*No init*/
 #define S_dev_Conflict      (M_devSup|21) /*Multiple records accessing same signal*/
+#define S_dev_noDevice      (M_devSup|23) /*No device at specified address*/
 
 #endif