diff --git a/src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java b/src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java
index 28a605d9f..b4b73bf6c 100644
--- a/src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java
+++ b/src/main/java/com/sk89q/worldedit/bukkit/BukkitWorld.java
@@ -886,10 +886,8 @@ public class BukkitWorld extends LocalWorld {
     public boolean isValidBlockType(int type) {
         if (!skipNmsValidBlockCheck) {
             try {
-                return type == 0 || (type >= 1 && type < net.minecraft.server.Block.byId.length
-                        && net.minecraft.server.Block.byId[type] != null);
-            } catch (Exception e) {
-                logger.log(Level.SEVERE, "Error checking NMS valid block type", e);
+                return NmsBlock.isValidBlockType(type);
+            } catch (Throwable e) {
                 skipNmsValidBlockCheck = true;
             }
         }
diff --git a/src/main/java/com/sk89q/worldedit/bukkit/NmsBlock.java b/src/main/java/com/sk89q/worldedit/bukkit/NmsBlock.java
index f5827ab0a..1bec84d96 100644
--- a/src/main/java/com/sk89q/worldedit/bukkit/NmsBlock.java
+++ b/src/main/java/com/sk89q/worldedit/bukkit/NmsBlock.java
@@ -434,4 +434,9 @@ class NmsBlock extends BaseBlock implements TileEntityBlock {
                     + foreign.getClass().getCanonicalName());
         }
     }
+
+    public static boolean isValidBlockType(int type) throws NoClassDefFoundError {
+        return type == 0 || (type >= 1 && type < net.minecraft.server.Block.byId.length
+                && net.minecraft.server.Block.byId[type] != null);
+    }
 }