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-rw-r--r--src/base/pngwriter.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/base/pngwriter.cc b/src/base/pngwriter.cc
index 3251ac885..9faf23c24 100644
--- a/src/base/pngwriter.cc
+++ b/src/base/pngwriter.cc
@@ -160,7 +160,7 @@ PngWriter::write(std::ostream &png) const
// libpng requires an array of pointers to the frame buffer's rows.
std::vector<PixelType> rowPacked(width);
for (unsigned y=0; y < height; ++y) {
- for (unsigned x=0; x < height; ++x) {
+ for (unsigned x=0; x < width; ++x) {
rowPacked[x] = fb.pixel(x, y);
}