diff --git a/raster/r.horizon/r.horizon.html b/raster/r.horizon/r.horizon.html
index acef17b2f69..df3f37eca5e 100644
--- a/raster/r.horizon/r.horizon.html
+++ b/raster/r.horizon/r.horizon.html
@@ -125,7 +125,7 @@
METHOD
This is continued until the line of sight reaches a height that is
higher than any point in the region or until it reaches the border of
the region (see also the bufferzone,e_buff, n_buff,
-s_buff, and w_buff). The the number of lines of sight (azimuth
+s_buff, and w_buff). The number of lines of sight (azimuth
directions) is determined from the direction and
step parameters. The method takes into account the curvature
of the Earth whereby remote features will seem to be lower than they