diff --git a/results.tex b/results.tex
index 8323589409e1eccbd6eaea56b608013388ff2cd0..d13e9a9ffab94440dab5fa084fb79f95698d7c29 100644
--- a/results.tex
+++ b/results.tex
@@ -55,7 +55,8 @@ a Haswell implementation that is significantly faster than the others.
 
 \subheading{The cost of completeness.}
 Another question we might be able to answer is if the factor-$1.4$ penalty
-claimed in~\cite{RCB16} for complete formulas vs incomplete formulas
+claimed in~\cite{RCB16} for complete formulas vs.\ incomplete formulas
+% On versus as 'vs.': https://english.stackexchange.com/a/5395
 on the same Weierstraß curve is realistic also
 for optimized implementations.