diff --git a/src/corelib/io/qurlrecode.cpp b/src/corelib/io/qurlrecode.cpp
index 2ac335cf5c..44e0a8239d 100644
--- a/src/corelib/io/qurlrecode.cpp
+++ b/src/corelib/io/qurlrecode.cpp
@@ -294,7 +294,7 @@ struct QUrlUtf8Traits : public QUtf8BaseTraitsNoAscii
 static bool encodedUtf8ToUtf16(QString &result, ushort *&output, const ushort *begin, const ushort *&input,
                                const ushort *end, ushort decoded)
 {
-    uint ucs4, *dst = &ucs4;
+    uint ucs4 = 0, *dst = &ucs4;
     const ushort *src = input + 3;// skip the %XX that yielded \a decoded
     int charsNeeded = QUtf8Functions::fromUtf8<QUrlUtf8Traits>(decoded, dst, src, end);
     if (charsNeeded < 0)
diff --git a/src/corelib/text/qstring.cpp b/src/corelib/text/qstring.cpp
index 422e1f8419..b05a3cd707 100644
--- a/src/corelib/text/qstring.cpp
+++ b/src/corelib/text/qstring.cpp
@@ -886,7 +886,7 @@ static int ucstricmp8(const char *utf8, const char *utf8end, const QChar *utf16,
     QStringIterator src2(utf16, utf16end);
 
     while (src1 < end1 && src2.hasNext()) {
-        uint uc1;
+        uint uc1 = 0;
         uint *output = &uc1;
         uchar b = *src1++;
         int res = QUtf8Functions::fromUtf8<QUtf8BaseTraits>(b, output, src1, end1);