diff --git a/doc/tutorial/imgproc/tutorial-imgproc-contrast-sharpening.dox b/doc/tutorial/imgproc/tutorial-imgproc-contrast-sharpening.dox
index 2ef50e7ea5..c0199d4b07 100644
--- a/doc/tutorial/imgproc/tutorial-imgproc-contrast-sharpening.dox
+++ b/doc/tutorial/imgproc/tutorial-imgproc-contrast-sharpening.dox
@@ -8,8 +8,8 @@
While the ViSP library is not intended to be an image processing library or replace a raster graphics editor, some easy image processing techniques can be used to improve the contrast and the sharpness of an image.
The different methods presented are:
-- histogram stretching, see the corresponding Gimp documentation.
-- histogram stretching in the HSV color space, see the corresponding Gimp documentation.
+- histogram stretching, see the corresponding Gimp documentation.
+- histogram stretching in the HSV color space, see the corresponding Gimp documentation.
- histogram equalization, see the corresponding Wikipedia entry.
- contrast limited adaptive histogram equalization (CLAHE), see the corresponding Wikipedia entry.
- unsharp masking, an image sharpening technique, see the corresponding Wikipedia entry.