diff --git a/src/corelib/global/qglobal.h b/src/corelib/global/qglobal.h
index 928bf138352..4a21ab88d89 100644
--- a/src/corelib/global/qglobal.h
+++ b/src/corelib/global/qglobal.h
@@ -655,7 +655,7 @@ Q_CORE_EXPORT void qt_assert(const char *assertion, const char *file, int line)
 
 #if !defined(Q_ASSERT)
 #  if defined(QT_NO_DEBUG) && !defined(QT_FORCE_ASSERTS)
-#    define Q_ASSERT(cond) qt_noop()
+#    define Q_ASSERT(cond) do { } while (false && (cond))
 #  else
 #    define Q_ASSERT(cond) ((!(cond)) ? qt_assert(#cond,__FILE__,__LINE__) : qt_noop())
 #  endif
diff --git a/src/corelib/io/qtemporaryfile.cpp b/src/corelib/io/qtemporaryfile.cpp
index 4a9aafcf0bc..c96d0504f45 100644
--- a/src/corelib/io/qtemporaryfile.cpp
+++ b/src/corelib/io/qtemporaryfile.cpp
@@ -222,6 +222,7 @@ static bool createFileFromTemplate(NativeFileHandle &file,
     }
 
     Q_ASSERT(false);
+    return false;
 }
 
 //************* QTemporaryFileEngine
diff --git a/src/corelib/kernel/qtranslator.cpp b/src/corelib/kernel/qtranslator.cpp
index 33827926c69..5687a6c3a35 100644
--- a/src/corelib/kernel/qtranslator.cpp
+++ b/src/corelib/kernel/qtranslator.cpp
@@ -273,6 +273,7 @@ static uint numerusHelper(int n, const uchar *rules, uint rulesSize)
     }
 
     Q_ASSERT(false);
+    return 0;
 }
 
 class QTranslatorPrivate : public QObjectPrivate
diff --git a/src/gui/text/qtextdocument_p.cpp b/src/gui/text/qtextdocument_p.cpp
index 8ff15106e34..d30ff78b8fe 100644
--- a/src/gui/text/qtextdocument_p.cpp
+++ b/src/gui/text/qtextdocument_p.cpp
@@ -125,14 +125,12 @@ static bool isValidBlockSeparator(QChar ch)
         || ch == QTextEndOfFrame;
 }
 
-#if !defined(QT_NO_DEBUG) || defined(QT_FORCE_ASSERTS)
 static bool noBlockInString(const QString &str)
 {
     return !str.contains(QChar::ParagraphSeparator)
         && !str.contains(QTextBeginningOfFrame)
         && !str.contains(QTextEndOfFrame);
 }
-#endif
 
 bool QTextUndoCommand::tryMerge(const QTextUndoCommand &other)
 {