diff --git a/src/qtgui/searchclause_w.cpp b/src/qtgui/searchclause_w.cpp
index c7999c31..6d4fa584 100644
--- a/src/qtgui/searchclause_w.cpp
+++ b/src/qtgui/searchclause_w.cpp
@@ -208,6 +208,8 @@ void SearchClauseW::tpChange(int index)
 	proxSlackSB->setEnabled(true);
 	if (index == 4)
 	    proxSlackSB->setValue(10);
+        else
+            proxSlackSB->setValue(0);
 	break;
     default:
 	proxSlackSB->close();