diff --git a/src/corelib/serialization/qxmlstream.g b/src/corelib/serialization/qxmlstream.g
index 713c5a17e0..ca798b46ac 100644
--- a/src/corelib/serialization/qxmlstream.g
+++ b/src/corelib/serialization/qxmlstream.g
@@ -873,7 +873,7 @@ processing_instruction ::= LANGLE QUESTIONMARK name space;
 /.
         case $rule_number: {
             setType(QXmlStreamReader::ProcessingInstruction);
-            int pos = sym(4).pos + sym(4).len;
+            const qsizetype pos = sym(4).pos + sym(4).len;
             processingInstructionTarget = symString(3);
             if (scanUntil("?>")) {
                 processingInstructionData = XmlStringRef(&textBuffer, pos, textBuffer.size() - pos - 2);
@@ -925,7 +925,7 @@ comment ::= comment_start RANGLE;
 /.
         case $rule_number: {
             setType(QXmlStreamReader::Comment);
-            int pos = sym(1).pos + 4;
+            const qsizetype pos = sym(1).pos + 4;
             text = XmlStringRef(&textBuffer, pos, textBuffer.size() - pos - 3);
         } break;
 ./
@@ -937,7 +937,7 @@ cdata ::= langle_bang CDATA_START;
             setType(QXmlStreamReader::Characters);
             isCDATA = true;
             isWhitespace = false;
-            int pos = sym(2).pos;
+            const qsizetype pos = sym(2).pos;
             if (scanUntil("]]>", -1)) {
                 text = XmlStringRef(&textBuffer, pos, textBuffer.size() - pos - 3);
             } else {
@@ -1216,7 +1216,7 @@ attribute ::= qname space_opt EQ space_opt attribute_value;
                 }
                 if (normalize) {
                     // normalize attribute value (simplify and trim)
-                    int pos = textBuffer.size();
+                    const qsizetype pos = textBuffer.size();
                     int n = 0;
                     bool wasSpace = true;
                     for (int i = 0; i < attribute.value.len; ++i) {
diff --git a/src/corelib/serialization/qxmlstream_p.h b/src/corelib/serialization/qxmlstream_p.h
index b797fe830e..60558ab189 100644
--- a/src/corelib/serialization/qxmlstream_p.h
+++ b/src/corelib/serialization/qxmlstream_p.h
@@ -409,7 +409,7 @@ public:
     int tos;
     int stack_size;
     struct Value {
-        int pos;
+        qsizetype pos;  // offset into textBuffer
         int len;
         int prefix;
         ushort c;
diff --git a/src/corelib/serialization/qxmlstreamparser_p.h b/src/corelib/serialization/qxmlstreamparser_p.h
index 0a3e60e233..a0ac276fd8 100644
--- a/src/corelib/serialization/qxmlstreamparser_p.h
+++ b/src/corelib/serialization/qxmlstreamparser_p.h
@@ -574,7 +574,7 @@ bool QXmlStreamReaderPrivate::parse()
 
         case 96: {
             setType(QXmlStreamReader::ProcessingInstruction);
-            int pos = sym(4).pos + sym(4).len;
+            const qsizetype pos = sym(4).pos + sym(4).len;
             processingInstructionTarget = symString(3);
             if (scanUntil("?>")) {
                 processingInstructionData = XmlStringRef(&textBuffer, pos, textBuffer.size() - pos - 2);
@@ -613,7 +613,7 @@ bool QXmlStreamReaderPrivate::parse()
 
         case 100: {
             setType(QXmlStreamReader::Comment);
-            int pos = sym(1).pos + 4;
+            const qsizetype pos = sym(1).pos + 4;
             text = XmlStringRef(&textBuffer, pos, textBuffer.size() - pos - 3);
         } break;
 
@@ -621,7 +621,7 @@ bool QXmlStreamReaderPrivate::parse()
             setType(QXmlStreamReader::Characters);
             isCDATA = true;
             isWhitespace = false;
-            int pos = sym(2).pos;
+            const qsizetype pos = sym(2).pos;
             if (scanUntil("]]>", -1)) {
                 text = XmlStringRef(&textBuffer, pos, textBuffer.size() - pos - 3);
             } else {
@@ -779,7 +779,7 @@ bool QXmlStreamReaderPrivate::parse()
                 }
                 if (normalize) {
                     // normalize attribute value (simplify and trim)
-                    int pos = textBuffer.size();
+                    const qsizetype pos = textBuffer.size();
                     int n = 0;
                     bool wasSpace = true;
                     for (int i = 0; i < attribute.value.len; ++i) {