diff --git a/src/libs/qmljs/qmljsdelta.cpp b/src/libs/qmljs/qmljsdelta.cpp
index da0022a419dbb81f9c4643b551c87aa64ea45ca9..6c71e3c5e7a4a03dc752dfeb2d3866947ce8064c 100644
--- a/src/libs/qmljs/qmljsdelta.cpp
+++ b/src/libs/qmljs/qmljsdelta.cpp
@@ -42,6 +42,10 @@ using namespace QmlJS::AST;
 namespace {
 using namespace QmlJS;
 
+enum {
+    debug = false
+};
+
 /*!
     Build a hash of the parents
  */
@@ -475,7 +479,8 @@ Delta::DebugIdMap Delta::operator()(const Document::Ptr &doc1, const Document::P
             UiObjectMember* parent = parents2.parent.value(y);
             if (!M.way2.contains(parent))
                 continue;
-            qDebug () << "Delta::operator():  insert " << label(y, doc2) << " to " << label(parent, doc2);
+            if (debug)
+                qDebug () << "Delta::operator():  insert " << label(y, doc2) << " to " << label(parent, doc2);
             insert(y, parent, newDebuggIds.value(parent), doc2);
             continue;
         }
@@ -494,7 +499,8 @@ Delta::DebugIdMap Delta::operator()(const Document::Ptr &doc1, const Document::P
         //     << " to "<< label(y, doc2) << "with parent " << label(parents2.parent.value(y), doc2);
 
         if (!M.contains(parents1.parent.value(x),parents2.parent.value(y))) {
-            qDebug () << "Delta::operator():  move " << label(y, doc2) << " from " << label(parents1.parent.value(x), doc1)
+            if (debug)
+                qDebug () << "Delta::operator():  move " << label(y, doc2) << " from " << label(parents1.parent.value(x), doc1)
             << " to " << label(parents2.parent.value(y), doc2);
             reparent(newDebuggIds.value(y), newDebuggIds.value(parents2.parent.value(y)));
             continue;
@@ -508,7 +514,8 @@ Delta::DebugIdMap Delta::operator()(const Document::Ptr &doc1, const Document::P
         if (!cast<UiObjectDefinition *>(x))
             continue;
         if (!M.way1.contains(x)) {
-            qDebug () << "Delta::operator():  remove " << label(x, doc1);
+            if (debug)
+                qDebug () << "Delta::operator():  remove " << label(x, doc1);
             QList<DebugId> ids = debugIds.value(x);
             if (!ids.isEmpty())
                 remove(ids);