diff --git a/eco-api/src/main/java/com/willfp/eco/core/integrations/placeholder/PlaceholderManager.java b/eco-api/src/main/java/com/willfp/eco/core/integrations/placeholder/PlaceholderManager.java
index 52fa8bd2..b5e6f225 100644
--- a/eco-api/src/main/java/com/willfp/eco/core/integrations/placeholder/PlaceholderManager.java
+++ b/eco-api/src/main/java/com/willfp/eco/core/integrations/placeholder/PlaceholderManager.java
@@ -8,6 +8,7 @@ import org.jetbrains.annotations.Nullable;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
+import java.util.Set;
 
 /**
  * Class to handle placeholder integrations.