diff --git a/buildcraft_resources/assets/buildcraft/lang/en_US.lang b/buildcraft_resources/assets/buildcraft/lang/en_US.lang
index 796f9d81..79a05610 100755
--- a/buildcraft_resources/assets/buildcraft/lang/en_US.lang
+++ b/buildcraft_resources/assets/buildcraft/lang/en_US.lang
@@ -258,9 +258,9 @@ achievement.woodenGearAchievement.desc=Craft a wooden gear
 achievement.stoneGearAchievement=Hard as a rock
 achievement.stoneGearAchievement.desc=Upgrade a wooden gear to a stone gear
 achievement.ironGearAchievement=Is it stainless?
-achievement.ironGearAchievement.desc=Upgrade a stone gear to a iron gear
+achievement.ironGearAchievement.desc=Upgrade a stone gear to an iron gear
 achievement.goldGearAchievement=No, it isn't made of honey
-achievement.goldGearAchievement.desc=Upgrade a iron gear to a gold gear
+achievement.goldGearAchievement.desc=Upgrade an iron gear to a gold gear
 achievement.diamondGearAchievement=Shiny!
 achievement.diamondGearAchievement.desc=Upgrade a gold gear to a diamond gear
 achievement.wrenchAchievement=Just hit it!