diff --git a/src/spicelib/devices/res/resext.h b/src/spicelib/devices/res/resext.h
index dd0cca1dc..ee4be5516 100644
--- a/src/spicelib/devices/res/resext.h
+++ b/src/spicelib/devices/res/resext.h
@@ -4,7 +4,6 @@ Author: 1985 Thomas L. Quarles
 **********/
 
 extern int RESask(CKTcircuit*,GENinstance*,int,IFvalue*,IFvalue*);
-extern int RESconvTest(GENmodel*, CKTcircuit*);
 extern int RESdelete(GENmodel*,IFuid,GENinstance**);
 extern void RESdestroy(GENmodel**);
 extern int RESload(GENmodel*,CKTcircuit*);