diff --git a/src/main/java/tconstruct/library/tools/ToolCore.java b/src/main/java/tconstruct/library/tools/ToolCore.java
index 996d1106..371893d0 100644
--- a/src/main/java/tconstruct/library/tools/ToolCore.java
+++ b/src/main/java/tconstruct/library/tools/ToolCore.java
@@ -790,6 +790,8 @@ public abstract class ToolCore extends Item implements IEnergyContainerItem, IMo
             int max = getMaxEnergyStored(stack);
             if(energy > 0) {
                 int damage = ((max - energy) * 100) / max;
+                if(damage == 0 && max-energy > 0)
+                    damage = 1;
                 super.setDamage(stack, damage);
                 return damage;
             }