diff --git a/src/corelib/kernel/qeventdispatcher_win.cpp b/src/corelib/kernel/qeventdispatcher_win.cpp
index c2b37357c7..240c25d085 100644
--- a/src/corelib/kernel/qeventdispatcher_win.cpp
+++ b/src/corelib/kernel/qeventdispatcher_win.cpp
@@ -1040,7 +1040,7 @@ int QEventDispatcherWin32::remainingTime(int timerId)
     }
 
 #ifndef QT_NO_DEBUG
-    qWarning("QEventDispatcherWin32::remainingTime: timer id %s not found", timerId);
+    qWarning("QEventDispatcherWin32::remainingTime: timer id %d not found", timerId);
 #endif
 
     return -1;
diff --git a/src/corelib/thread/qthread_win.cpp b/src/corelib/thread/qthread_win.cpp
index c0c30bae8f..f2713f6b8b 100644
--- a/src/corelib/thread/qthread_win.cpp
+++ b/src/corelib/thread/qthread_win.cpp
@@ -219,7 +219,7 @@ DWORD WINAPI qt_adopted_thread_watcher_function(LPVOID)
             } while (ret == WAIT_TIMEOUT);
         }
 
-        if (ret == WAIT_FAILED || !(ret >= WAIT_OBJECT_0 && ret < WAIT_OBJECT_0 + uint(count))) {
+        if (ret == WAIT_FAILED || ret >= WAIT_OBJECT_0 + uint(count)) {
             qWarning("QThread internal error while waiting for adopted threads: %d", int(GetLastError()));
             continue;
         }
diff --git a/src/gui/image/qpixmap.cpp b/src/gui/image/qpixmap.cpp
index a082cf426e..be34671be0 100644
--- a/src/gui/image/qpixmap.cpp
+++ b/src/gui/image/qpixmap.cpp
@@ -841,7 +841,9 @@ bool QPixmap::doImageIO(QImageWriter *writer, int quality) const
 
 void QPixmap::fill(const QPaintDevice *device, const QPoint &p)
 {
-    qWarning() << "QPixmap::fill(const QPaintDevice *device, const QPoint &offset) is deprecated, ignored";
+    Q_UNUSED(device)
+    Q_UNUSED(p)
+    qWarning("%s is deprecated, ignored", Q_FUNC_INFO);
 }
 
 
diff --git a/src/widgets/widgets/qwidgetlinecontrol.cpp b/src/widgets/widgets/qwidgetlinecontrol.cpp
index ba7e2ddacf..7584d7da6b 100644
--- a/src/widgets/widgets/qwidgetlinecontrol.cpp
+++ b/src/widgets/widgets/qwidgetlinecontrol.cpp
@@ -730,7 +730,7 @@ void QWidgetLineControl::internalSetText(const QString &txt, int pos, bool edite
     m_modifiedState =  m_undoState = 0;
     m_cursor = (pos < 0 || pos > m_text.length()) ? m_text.length() : pos;
     m_textDirty = (oldText != m_text);
-    bool changed = finishChange(-1, true, edited);
+    const bool changed = finishChange(-1, true, edited);
 
 #ifndef QT_NO_ACCESSIBILITY
     if (changed) {
@@ -748,6 +748,8 @@ void QWidgetLineControl::internalSetText(const QString &txt, int pos, bool edite
             QAccessible::updateAccessibility(&event);
         }
     }
+#else
+    Q_UNUSED(changed)
 #endif
 }