diff --git a/exercises/protein-translation/description.md b/exercises/protein-translation/description.md
index 858c78f9a..142891469 100644
--- a/exercises/protein-translation/description.md
+++ b/exercises/protein-translation/description.md
@@ -2,7 +2,7 @@
 
 Translate RNA sequences into proteins.
 
-RNA can be broken into three nucleotide sequences called codons, and then translated to a protein like so:
+RNA can be broken into three-nucleotide sequences called codons, and then translated to a protein like so:
 
 RNA: `"AUGUUUUCU"` => translates to