diff --git a/SchematicSystem_Core/src/de/steamwar/schematicsystem/autocheck/AutoCheckerResult.java b/SchematicSystem_Core/src/de/steamwar/schematicsystem/autocheck/AutoCheckerResult.java
index 72054e1..989fd97 100644
--- a/SchematicSystem_Core/src/de/steamwar/schematicsystem/autocheck/AutoCheckerResult.java
+++ b/SchematicSystem_Core/src/de/steamwar/schematicsystem/autocheck/AutoCheckerResult.java
@@ -89,7 +89,7 @@ public class AutoCheckerResult {
     }
 
     public boolean isBlockCountOk() {
-        return type.getMaxBlocks() == 0 || blockCounts.values().stream().reduce(Integer::sum).map(i -> i <= type.getMaxBlocks()).orElse(false);
+        return type.getMaxBlocks() == 0 || blockCounts.entrySet().stream().filter(entry -> entry.getKey() != Material.AIR).map(Map.Entry::getValue).reduce(Integer::sum).map(i -> i <= type.getMaxBlocks()).orElse(false);
     }
 
     public boolean isLimitedBlocksOK() {