diff --git a/L2J_Mobius_Underground/dist/game/data/stats/skills/17700-17799.xml b/L2J_Mobius_Underground/dist/game/data/stats/skills/17700-17799.xml
index 7b080ca456..e428c4c614 100644
--- a/L2J_Mobius_Underground/dist/game/data/stats/skills/17700-17799.xml
+++ b/L2J_Mobius_Underground/dist/game/data/stats/skills/17700-17799.xml
@@ -171,11 +171,11 @@
 			</effect>
 			<effect name="DefenceCriticalDamage">
 				<amount>
-					<value level="1">1</value>
-					<value level="2">2</value>
-					<value level="3">3</value>
-					<value level="4">4</value>
-					<value level="5">5</value>
+					<value level="1">-1</value>
+					<value level="2">-2</value>
+					<value level="3">-3</value>
+					<value level="4">-4</value>
+					<value level="5">-5</value>
 				</amount>
 				<mode>PER</mode>
 			</effect>
@@ -203,11 +203,11 @@
 			</effect>
 			<effect name="DefenceCriticalDamage">
 				<amount>
-					<value level="1">1</value>
-					<value level="2">2</value>
-					<value level="3">3</value>
-					<value level="4">4</value>
-					<value level="5">5</value>
+					<value level="1">-1</value>
+					<value level="2">-2</value>
+					<value level="3">-3</value>
+					<value level="4">-4</value>
+					<value level="5">-5</value>
 				</amount>
 				<mode>PER</mode>
 			</effect>