diff --git a/ighdriv.c b/ighdriv.c
index 4e9bc9b..c6277d8 100644
--- a/ighdriv.c
+++ b/ighdriv.c
@@ -30,6 +30,7 @@ Markus Zolliker, May 2005
 #include "oxinst.h"
 #include "fsm.h"
 #include "initializer.h"
+#include "syncedprot.h"
 
 #define OLDIGH -8
 #define SORBS_FLAG 1
@@ -80,6 +81,7 @@ typedef struct {
   int o;                        /* actual still/sorb mode */
   int s;                        /* moving valve state */
   int remote;
+  long hrSync;
 } Igh;
 
 static ParClass ighClass = { "IGH", sizeof(Igh) };
@@ -183,6 +185,9 @@ static void IghParDef(void *object)
   ParInt(&drv->e, PAR_NAN);
   if (ParActionIs(PAR_SET) > 0) {
     drv->mixP = 0;
+    if (drv->hrSync == 0) {
+      drv->hrSync=SyncedIncr(0);
+    }
   }
 
   ParName("Pstill");
@@ -743,6 +748,10 @@ static long IghSet(long pc, void *object)
     EaseWrite(eab, buf);
     return __LINE__;
   case __LINE__:                 /**********************************/
+    if (drv->hrSync > 0) {
+      SyncedDecr(drv->hrSync);
+      drv->hrSync = 0;
+    }
     if (drv->a == 2) goto loop;
     EaseWrite(eab, "A1");
     return __LINE__;