diff --git a/src/site/markdown/design/digital-elevation-model.md b/src/site/markdown/design/digital-elevation-model.md
index 153cef8b4b9ac74c626f56a5c3cbe8bee8bf0b74..15e5c29ffd2d66833632f5b4bc4d4a1b4f6663b8 100644
--- a/src/site/markdown/design/digital-elevation-model.md
+++ b/src/site/markdown/design/digital-elevation-model.md
@@ -14,7 +14,7 @@
 
 DEM intersection
 ------------
-The page [technical choices](./technical-choices.html) explains how Rugged goes from an on-board pixel
+The page [technical choices](./technical-choices.html) explain how Rugged goes from an on-board pixel
 line-of-sight to a ground-based line-of-sight arrival in the vicinity of the ellipsoid entry point. At
 this step, we have a 3D line defined near the surface and want to compute where it exactly traverses the
 Digital Elevation Model surface. There is no support for this computation at Orekit library level,