diff --git a/paper-server/src/main/java/io/papermc/paper/attribute/UnmodifiableAttributeInstance.java b/paper-server/src/main/java/io/papermc/paper/attribute/UnmodifiableAttributeInstance.java
index 12135ffeac..52439f4b95 100644
--- a/paper-server/src/main/java/io/papermc/paper/attribute/UnmodifiableAttributeInstance.java
+++ b/paper-server/src/main/java/io/papermc/paper/attribute/UnmodifiableAttributeInstance.java
@@ -23,6 +23,11 @@ public class UnmodifiableAttributeInstance extends CraftAttributeInstance {
         throw new UnsupportedOperationException("Cannot modify default attributes");
     }
 
+    @Override
+    public void addTransientModifier(AttributeModifier modifier) {
+        throw new UnsupportedOperationException("Cannot modify default attributes");
+    }
+
     @Override
     public void removeModifier(AttributeModifier modifier) {
         throw new UnsupportedOperationException("Cannot modify default attributes");
diff --git a/paper-server/src/main/java/org/bukkit/craftbukkit/attribute/CraftAttributeInstance.java b/paper-server/src/main/java/org/bukkit/craftbukkit/attribute/CraftAttributeInstance.java
index 3b171a08bd..cd6a492f56 100644
--- a/paper-server/src/main/java/org/bukkit/craftbukkit/attribute/CraftAttributeInstance.java
+++ b/paper-server/src/main/java/org/bukkit/craftbukkit/attribute/CraftAttributeInstance.java
@@ -51,6 +51,14 @@ public class CraftAttributeInstance implements AttributeInstance {
         this.handle.addPermanentModifier(CraftAttributeInstance.convert(modifier));
     }
 
+    // Paper start - Transient modifier API
+    @Override
+    public void addTransientModifier(AttributeModifier modifier) {
+        Preconditions.checkArgument(modifier != null, "modifier");
+        this.handle.addTransientModifier(CraftAttributeInstance.convert(modifier));
+    }
+    // Paper end
+
     @Override
     public void removeModifier(AttributeModifier modifier) {
         Preconditions.checkArgument(modifier != null, "modifier");