diff --git a/src/app/i18n/en.json b/src/app/i18n/en.json
index eba7f829..1290640c 100644
--- a/src/app/i18n/en.json
+++ b/src/app/i18n/en.json
@@ -276,8 +276,10 @@
     "thermres": "Thermal resistance",
     "wepcap": "Weapons capacity",
     "weprate": "Weapons recharge rate",
+    "minmass": "Minimum mass",
     "minmass_sg": "Minimum hull mass",
     "optmass_sg": "Optimal hull mass",
+    "maxmass": "Maximum mass",
     "maxmass_sg": "Maximum hull mass",
     "minmul_sg": "Minimum strength",
     "optmul_sg": "Optimal strength",