diff --git a/worldedit-core/src/main/java/com/sk89q/worldedit/extent/clipboard/io/BuiltInClipboardFormat.java b/worldedit-core/src/main/java/com/sk89q/worldedit/extent/clipboard/io/BuiltInClipboardFormat.java
index af58a3f59..9cce51ec8 100644
--- a/worldedit-core/src/main/java/com/sk89q/worldedit/extent/clipboard/io/BuiltInClipboardFormat.java
+++ b/worldedit-core/src/main/java/com/sk89q/worldedit/extent/clipboard/io/BuiltInClipboardFormat.java
@@ -24,11 +24,8 @@ import com.boydti.fawe.object.io.ResettableFileInputStream;
 import com.boydti.fawe.object.schematic.MinecraftStructure;
 import com.boydti.fawe.object.schematic.PNGWriter;
 import com.google.common.collect.ImmutableSet;
-import com.sk89q.jnbt.CompoundTag;
 import com.sk89q.jnbt.NBTInputStream;
 import com.sk89q.jnbt.NBTOutputStream;
-import com.sk89q.jnbt.NamedTag;
-import com.sk89q.jnbt.Tag;
 
 import java.io.BufferedInputStream;
 import java.io.BufferedOutputStream;
@@ -37,7 +34,6 @@ import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.util.Map;
 import java.util.Set;
 import java.util.zip.GZIPInputStream;
 import java.util.zip.GZIPOutputStream;
@@ -77,25 +73,7 @@ public enum BuiltInClipboardFormat implements ClipboardFormat {
         @Override
         public boolean isFormat(File file) {
             String name = file.getName().toLowerCase();
-            if (name.endsWith(".schematic")) {
-                try (NBTInputStream str = new NBTInputStream(new GZIPInputStream(new FileInputStream(file)))) {
-                    NamedTag rootTag = str.readNamedTag();
-                    if (!rootTag.getName().equals("Schematic")) {
-                        return false;
-                    }
-                    CompoundTag schematicTag = (CompoundTag) rootTag.getTag();
-
-                    // Check
-                    Map<String, Tag> schematic = schematicTag.getValue();
-                    if (!schematic.containsKey("Materials")) {
-                        return false;
-                    }
-                } catch (Exception e) {
-                    return false;
-                }
-                return true;
-            }
-            return name.endsWith(".mcedit") || name.endsWith(".mce");
+            return name.endsWith(".schematic") || name.endsWith(".mcedit") || name.endsWith(".mce");
         }
     },
     SPONGE_SCHEMATIC("sponge", "schem") {
@@ -131,24 +109,7 @@ public enum BuiltInClipboardFormat implements ClipboardFormat {
         @Override
         public boolean isFormat(File file) {
             String name = file.getName().toLowerCase();
-            if (name.endsWith(".schem") || name.endsWith(".sponge")) {
-                try (NBTInputStream str = new NBTInputStream(new GZIPInputStream(new FileInputStream(file)))) {
-                    NamedTag rootTag = str.readNamedTag();
-                    if (!rootTag.getName().equals("Schematic")) {
-                        return false;
-                    }
-                    CompoundTag schematicTag = (CompoundTag) rootTag.getTag();
-
-                    // Check
-                    Map<String, Tag> schematic = schematicTag.getValue();
-                    if (!schematic.containsKey("Version")) {
-                        return false;
-                    }
-                } catch (Exception e) {
-                    return false;
-                }
-            }
-            return false;
+            return name.endsWith(".schem") || name.endsWith(".sponge");
         }
 
     },