diff --git a/stdpopsim/catalog/PhoSin/dfes.py b/stdpopsim/catalog/PhoSin/dfes.py
index ef84f4b31..a8cf2fb7b 100644
--- a/stdpopsim/catalog/PhoSin/dfes.py
+++ b/stdpopsim/catalog/PhoSin/dfes.py
@@ -16,9 +16,9 @@ def _RobinsonDFE():
     Vaquita DFE inferred by Robinson et al. (2022), and used in simulations.
     The DFE was inferred assuming synonymous variants are neutral and a relative
     mutation rate ratio of 2.31 nonsynonymous to 1 synonymous mutation
-    (Huber et al. 2017). Inference procedure is described in pages 9-10 of
+    (Huber et al. 2017). The inference procedure is described in pages 9-10 of
     the supplementary material of Robinson et al. (2022), and values used in
-    SLiM simulations based on this DFE are specified in pages 11-12
+    SLiM simulations based on this DFE are specified in pages 11-12.
     Supplement URL:
     https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9881057/
     bin/NIHMS1864134-supplement-Supplementary_material.pdf