diff --git a/src/misc/iocInit.h b/src/misc/iocInit.h
index 7464f9217..dc9ea9427 100644
--- a/src/misc/iocInit.h
+++ b/src/misc/iocInit.h
@@ -23,6 +23,8 @@ epicsShareFunc int iocBuild(void);
 epicsShareFunc int iocRun(void);
 epicsShareFunc int iocPause(void);
 
+epicsShareExtern struct dsxt devSoft_DSXT;
+
 #ifdef __cplusplus
 }
 #endif