diff --git a/src/plugins/platforms/ios/qiosscreen.mm b/src/plugins/platforms/ios/qiosscreen.mm
index 106cf1a9781..c28d8881bf7 100644
--- a/src/plugins/platforms/ios/qiosscreen.mm
+++ b/src/plugins/platforms/ios/qiosscreen.mm
@@ -120,7 +120,7 @@ static QString deviceModelIdentifier()
 
 QIOSScreen::QIOSScreen(unsigned int screenIndex)
     : QPlatformScreen()
-    , m_uiScreen([[UIScreen screens] objectAtIndex:qMin(screenIndex, [[UIScreen screens] count] - 1)])
+    , m_uiScreen([[UIScreen screens] objectAtIndex:qMin(NSUInteger(screenIndex), [[UIScreen screens] count] - 1)])
     , m_orientationListener(0)
 {
     NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];