diff --git a/src/gui/painting/qpaintengine_raster.cpp b/src/gui/painting/qpaintengine_raster.cpp
index 26f8de5b8b0..19a0fac9726 100644
--- a/src/gui/painting/qpaintengine_raster.cpp
+++ b/src/gui/painting/qpaintengine_raster.cpp
@@ -3745,6 +3745,8 @@ QImage QRasterBuffer::colorizeBitmap(const QImage &image, const QColor &color)
 
     const QImage sourceImage = image.convertToFormat(QImage::Format_MonoLSB);
     QImage dest = QImage(sourceImage.size(), QImage::Format_ARGB32_Premultiplied);
+    if (sourceImage.isNull() || dest.isNull())
+        return image; // we must have run out of memory
 
     QRgb fg = qPremultiply(color.rgba());
     QRgb bg = 0;
@@ -3754,8 +3756,6 @@ QImage QRasterBuffer::colorizeBitmap(const QImage &image, const QColor &color)
     for (int y=0; y<height; ++y) {
         const uchar *source = sourceImage.constScanLine(y);
         QRgb *target = reinterpret_cast<QRgb *>(dest.scanLine(y));
-        if (!source || !target)
-            QT_THROW(std::bad_alloc()); // we must have run out of memory
         for (int x=0; x < width; ++x)
             target[x] = (source[x>>3] >> (x&7)) & 1 ? fg : bg;
     }