diff --git a/doc/glm.tex b/doc/glm.tex
index 07e09b23..b35db8df 100644
--- a/doc/glm.tex
+++ b/doc/glm.tex
@@ -1456,7 +1456,7 @@ vec3 lighting(
 
 \subsubsection{\href{http://outerra.com/}{Outerra}}
 
-A 3D planetary engine for seamless planet rendering from space down to the surface. Can use arbitrary resolution of elevation data, refining it to centimeter resolution using fractal algorithms.
+A 3D planetary engine for seamless planet rendering from space down to the surface. Can use arbitrarily precise elevation data, refining it to centimeter resolution using fractal algorithms.
 
 \begin{center}
   \includegraphics[width=0.4\textwidth]{outerra1}