diff --git a/src/main/java/WayofTime/bloodmagic/altar/AltarUpgrade.java b/src/main/java/WayofTime/bloodmagic/altar/AltarUpgrade.java
index bdca69c4..fce1de92 100644
--- a/src/main/java/WayofTime/bloodmagic/altar/AltarUpgrade.java
+++ b/src/main/java/WayofTime/bloodmagic/altar/AltarUpgrade.java
@@ -14,7 +14,7 @@ public class AltarUpgrade {
     }
 
     public AltarUpgrade upgrade(BloodRuneType rune) {
-        upgradeLevels.compute(rune, (r, l) -> l == null ? 0 : l + 1);
+        upgradeLevels.compute(rune, (r, l) -> l == null ? 1 : l + 1);
         return this;
     }