diff --git a/Data/Abbr/chemistry.csv b/Data/Abbr/chemistry.csv
index 4af39b65..497dfcce 100644
--- a/Data/Abbr/chemistry.csv
+++ b/Data/Abbr/chemistry.csv
@@ -375,7 +375,7 @@ HACCP,Hazard Analysis and Critical Control Points
 HAP,Hazardous Air Pollutant
 HAS,Helium Atom Scattering
 HAS,HyAluronan Synthase
-HAT,Hypoxanthine, Aminopterin, Thymidine
+HAT,"Hypoxanthine, Aminopterin, Thymidine"
 HAZMAT,HAZardous MATerials
 Hb,Hemoglobin
 HB,Hydrogen Bonded