diff --git a/src/iec61850/inc_private/control.h b/src/iec61850/inc_private/control.h
index 23a27e4b..ce26a75c 100644
--- a/src/iec61850/inc_private/control.h
+++ b/src/iec61850/inc_private/control.h
@@ -65,13 +65,14 @@ struct sControlObject
     MmsValue* ctlNumSt;
     MmsValue* originSt;
 
+    DataAttribute* stSeld;
+
     char ctlObjectName[130];
 
     /* for LastAppIError */
     MmsValue* error;
     MmsValue* addCause;
 
-    bool selected;
     uint64_t selectTime;
     uint32_t selectTimeout;
     MmsValue* sboClass;
diff --git a/src/iec61850/server/mms_mapping/control.c b/src/iec61850/server/mms_mapping/control.c
index 9a4548ea..435eb4f8 100644
--- a/src/iec61850/server/mms_mapping/control.c
+++ b/src/iec61850/server/mms_mapping/control.c
@@ -393,6 +393,17 @@ ControlObject_initialize(ControlObject* self)
         MmsValue_setVisibleString(self->sbo, controlObjectReference);
     }
 
+    char* stSeldName = StringUtils_createStringInBuffer(strBuf, 6, self->mmsDomain->domainName, "/", self->lnName, ".", self->name, ".stSeld");
+
+    self->stSeld = (DataAttribute*) IedModel_getModelNodeByObjectReference(self->iedServer->model, stSeldName);
+
+    if ((self->stSeld) && (self->stSeld->type != IEC61850_BOOLEAN)) {
+        self->stSeld = NULL;
+
+        if (DEBUG_IED_SERVER)
+            printf("IED_SERVER:  ERROR - stSeld of wrong type!\n");
+    }
+
     self->error = MmsValue_newIntegerFromInt32(0);
     self->addCause = MmsValue_newIntegerFromInt32(0);
 
@@ -488,6 +499,14 @@ ControlObject_getMmsValue(ControlObject* self)
     return self->mmsValue;
 }
 
+static void
+setStSeld(ControlObject* self, bool value)
+{
+    if (self->stSeld) {
+        IedServer_updateBooleanAttributeValue(self->iedServer, self->stSeld, value);
+    }
+}
+
 static void
 selectObject(ControlObject* self, uint64_t selectTime, MmsServerConnection connection)
 {
@@ -495,9 +514,10 @@ selectObject(ControlObject* self, uint64_t selectTime, MmsServerConnection conne
         printf("IED_SERVER: control %s selected\n", self->ctlObjectName);
 
     updateSboTimeoutValue(self);
-    self->selected = true;
+
     self->selectTime = selectTime;
     self->mmsConnection = connection;
+    setStSeld(self, true);
     setState(self, STATE_READY);
 }
 
@@ -506,6 +526,8 @@ unselectObject(ControlObject* self)
 {
     setState(self, STATE_UNSELECTED);
 
+    setStSeld(self, false);
+
     if (DEBUG_IED_SERVER)
         printf("IED_SERVER: control %s unselected\n", self->ctlObjectName);
 }