diff --git a/paper-server/src/main/java/org/bukkit/craftbukkit/util/CraftNBTTagConfigSerializer.java b/paper-server/src/main/java/org/bukkit/craftbukkit/util/CraftNBTTagConfigSerializer.java
index be9686a424..1d282b1f3c 100644
--- a/paper-server/src/main/java/org/bukkit/craftbukkit/util/CraftNBTTagConfigSerializer.java
+++ b/paper-server/src/main/java/org/bukkit/craftbukkit/util/CraftNBTTagConfigSerializer.java
@@ -18,7 +18,7 @@ import org.jetbrains.annotations.NotNull;
 public class CraftNBTTagConfigSerializer {
 
     private static final Pattern ARRAY = Pattern.compile("^\\[.*]");
-    private static final Pattern INTEGER = Pattern.compile("[-+]?(?:0|[1-9][0-9]*)?i", Pattern.CASE_INSENSITIVE);
+    private static final Pattern INTEGER = Pattern.compile("[-+]?(?:0|[1-9][0-9]*)i", Pattern.CASE_INSENSITIVE); // Paper - fix regex
     private static final Pattern DOUBLE = Pattern.compile("[-+]?(?:[0-9]+[.]?|[0-9]*[.][0-9]+)(?:e[-+]?[0-9]+)?d", Pattern.CASE_INSENSITIVE);
     private static final TagParser MOJANGSON_PARSER = new TagParser(new StringReader(""));