diff --git a/src/corelib/serialization/qxmlstream.g b/src/corelib/serialization/qxmlstream.g
index ca798b46ac..db9be6d8ac 100644
--- a/src/corelib/serialization/qxmlstream.g
+++ b/src/corelib/serialization/qxmlstream.g
@@ -760,14 +760,14 @@ attlist_decl ::= langle_bang ATTLIST qname attdef_list space_opt RANGLE;
         case $rule_number: {
             if (referenceToUnparsedEntityDetected && !standalone)
                 break;
-            int n = dtdAttributes.size();
+            qsizetype n = dtdAttributes.size();
             XmlStringRef tagName = addToStringStorage(symName(3));
             while (n--) {
                 DtdAttribute &dtdAttribute = dtdAttributes[n];
                 if (!dtdAttribute.tagName.isNull())
                     break;
                 dtdAttribute.tagName = tagName;
-                for (int i = 0; i < n; ++i) {
+                for (qsizetype i = 0; i < n; ++i) {
                     if ((dtdAttributes[i].tagName.isNull() || dtdAttributes[i].tagName == tagName)
                         && dtdAttributes[i].attributeQualifiedName == dtdAttribute.attributeQualifiedName) {
                         dtdAttribute.attributeQualifiedName.clear(); // redefined, delete it
diff --git a/src/corelib/serialization/qxmlstreamparser_p.h b/src/corelib/serialization/qxmlstreamparser_p.h
index a0ac276fd8..de8cfcbd23 100644
--- a/src/corelib/serialization/qxmlstreamparser_p.h
+++ b/src/corelib/serialization/qxmlstreamparser_p.h
@@ -486,14 +486,14 @@ bool QXmlStreamReaderPrivate::parse()
         case 88: {
             if (referenceToUnparsedEntityDetected && !standalone)
                 break;
-            int n = dtdAttributes.size();
+            qsizetype n = dtdAttributes.size();
             XmlStringRef tagName = addToStringStorage(symName(3));
             while (n--) {
                 DtdAttribute &dtdAttribute = dtdAttributes[n];
                 if (!dtdAttribute.tagName.isNull())
                     break;
                 dtdAttribute.tagName = tagName;
-                for (int i = 0; i < n; ++i) {
+                for (qsizetype i = 0; i < n; ++i) {
                     if ((dtdAttributes[i].tagName.isNull() || dtdAttributes[i].tagName == tagName)
                         && dtdAttributes[i].attributeQualifiedName == dtdAttribute.attributeQualifiedName) {
                         dtdAttribute.attributeQualifiedName.clear(); // redefined, delete it