1 files changed, 8 insertions, 2 deletions
diff --git a/generic/ttk/ttkScroll.c b/generic/ttk/ttkScroll.c
index defe05a..fc305e9 100644
--- a/generic/ttk/ttkScroll.c
+++ b/generic/ttk/ttkScroll.c
@@ -34,7 +34,7 @@
  * TtkScrollbarUpdateRequired, which will invoke step (5) (@@@ Fix this)
  */
 
-#include <tk.h>
+#include <tkInt.h>
 #include "ttkTheme.h"
 #include "ttkWidget.h"
 
@@ -78,6 +78,7 @@ static int UpdateScrollbar(Tcl_Interp *interp, ScrollHandle h)
     char arg1[TCL_DOUBLE_SPACE + 2];
     char arg2[TCL_DOUBLE_SPACE + 2];
     int code;
+    Tcl_DString buf;
 
     h->flags &= ~SCROLL_UPDATE_REQUIRED;
 
@@ -88,9 +89,14 @@ static int UpdateScrollbar(Tcl_Interp *interp, ScrollHandle h)
     arg1[0] = arg2[0] = ' ';
     Tcl_PrintDouble(interp, (double)s->first / s->total, arg1+1);
     Tcl_PrintDouble(interp, (double)s->last / s->total, arg2+1);
+    Tcl_DStringInit(&buf);
+    Tcl_DStringAppend(&buf, s->scrollCmd, -1);
+    Tcl_DStringAppend(&buf, arg1, -1);
+    Tcl_DStringAppend(&buf, arg2, -1);
 
     Tcl_Preserve(corePtr);
-    code = Tcl_VarEval(interp, s->scrollCmd, arg1, arg2, NULL);
+    code = Tcl_EvalEx(interp, Tcl_DStringValue(&buf), -1, TCL_EVAL_GLOBAL);
+    Tcl_DStringFree(&buf);
     if (WidgetDestroyed(corePtr)) {
 	Tcl_Release(corePtr);
 	return TCL_ERROR;