diff --git a/src/spicelib/devices/cktfinddev.c b/src/spicelib/devices/cktfinddev.c
index b5115b283..5e0f682c5 100644
--- a/src/spicelib/devices/cktfinddev.c
+++ b/src/spicelib/devices/cktfinddev.c
@@ -9,7 +9,8 @@ Author: 1985 Thomas L. Quarles
 #include "ngspice/sperror.h"
 #include "string.h"
 
-
+/* Key is the pointer to the device name, not the name itself.
+   The pointer to the instance is returned. */
 GENinstance *
 CKTfndDev(CKTcircuit *ckt, IFuid name)
 {