Index: binaries/data/mods/public/gui/common/tooltips.js
===================================================================
--- binaries/data/mods/public/gui/common/tooltips.js
+++ binaries/data/mods/public/gui/common/tooltips.js
@@ -219,7 +219,7 @@
 		"details":
 			Object.keys(template.armour).map(
 				dmgType => sprintf(translate("%(damage)s %(damageType)s %(armorPercentage)s"), {
-					"damage": template.armour[dmgType].toFixed(1),
+					"damage": template.armour[dmgType].toFixed(0),
 					"damageType": unitFont(translateWithContext("damage type", dmgType)),
 					"armorPercentage":
 						'[font="sans-10"]' +