diff --git a/src/corelib/text/qstring.cpp b/src/corelib/text/qstring.cpp
index 348276810be..fea5fb00df5 100644
--- a/src/corelib/text/qstring.cpp
+++ b/src/corelib/text/qstring.cpp
@@ -2570,7 +2570,8 @@ QString& QString::insert(int i, const QChar *unicode, int size)
         return *this;
 
     const ushort *s = (const ushort *)unicode;
-    if (s >= d.data() && s < d.data() + d.size) {
+    const std::less<const ushort*> less;
+    if (!less(s, d.data()) && less(s, d.data() + d.size)) {
         // Part of me - take a copy
         ushort *tmp = static_cast<ushort *>(::malloc(size * sizeof(QChar)));
         Q_CHECK_PTR(tmp);