diff --git a/src/gui/painting/qpaintengine_raster.cpp b/src/gui/painting/qpaintengine_raster.cpp
index 0866e1ce208..979a370bba5 100644
--- a/src/gui/painting/qpaintengine_raster.cpp
+++ b/src/gui/painting/qpaintengine_raster.cpp
@@ -3801,7 +3801,7 @@ void QClipData::initialize()
         return;
 
     if (!m_clipLines)
-        m_clipLines = (ClipLine *)calloc(sizeof(ClipLine), clipSpanHeight);
+        m_clipLines = (ClipLine *)calloc(clipSpanHeight, sizeof(ClipLine));
 
     Q_CHECK_PTR(m_clipLines);
     QT_TRY {