1 files changed, 3 insertions, 1 deletions
diff --git a/src/corelib/mimetypes/qmimemagicrule_p.h b/src/corelib/mimetypes/qmimemagicrule_p.h
index e1d4719026..bd1b72d113 100644
--- a/src/corelib/mimetypes/qmimemagicrule_p.h
+++ b/src/corelib/mimetypes/qmimemagicrule_p.h
@@ -63,7 +63,9 @@ public:
     static Type type(const QByteArray &type);
     static QByteArray typeName(Type type);
 
-    static bool matchSubstring(const char *dataPtr, int dataSize, int rangeStart, int rangeLength, int valueLength, const char *valueData, const char *mask);
+    static bool matchSubstring(const char *dataPtr, qsizetype dataSize, int rangeStart,
+                               int rangeLength, qsizetype valueLength, const char *valueData,
+                               const char *mask);
 
 private:
     Type m_type;