diff --git a/R/s2-earth.R b/R/s2-earth.R
index 333d14c8..48141308 100644
--- a/R/s2-earth.R
+++ b/R/s2-earth.R
@@ -13,7 +13,7 @@
 #' Yoder, C.F. 1995. "Astrometric and Geodetic Properties of Earth and the
 #' Solar System" in Global Earth Physics, A Handbook of Physical Constants,
 #' AGU Reference Shelf 1, American Geophysical Union, Table 2.
-#' <https://doi.org/10.1029/RF001p0001>
+#' \doi{10.1029/RF001p0001}
 #'
 #' @examples
 #' s2_earth_radius_meters()
diff --git a/man/s2_earth_radius_meters.Rd b/man/s2_earth_radius_meters.Rd
index 73317efd..249e411f 100644
--- a/man/s2_earth_radius_meters.Rd
+++ b/man/s2_earth_radius_meters.Rd
@@ -21,5 +21,5 @@ s2_earth_radius_meters()
 Yoder, C.F. 1995. "Astrometric and Geodetic Properties of Earth and the
 Solar System" in Global Earth Physics, A Handbook of Physical Constants,
 AGU Reference Shelf 1, American Geophysical Union, Table 2.
-\url{https://doi.org/10.1029/RF001p0001}
+\doi{10.1029/RF001p0001}
 }