diff --git a/leaves-server/src/main/java/org/leavesmc/leaves/protocol/syncmatica/ServerPlacement.java b/leaves-server/src/main/java/org/leavesmc/leaves/protocol/syncmatica/ServerPlacement.java
index a648cae1..0f8f34ec 100644
--- a/leaves-server/src/main/java/org/leavesmc/leaves/protocol/syncmatica/ServerPlacement.java
+++ b/leaves-server/src/main/java/org/leavesmc/leaves/protocol/syncmatica/ServerPlacement.java
@@ -36,6 +36,7 @@ public class ServerPlacement {
 
     private static String removeExtension(final String fileName) {
         final int pos = fileName.lastIndexOf(".");
+        if (pos < 0) return fileName;
         return fileName.substring(0, pos);
     }