diff --git a/src/main/java/gregtech/api/util/GT_ProcessingArray_Manager.java b/src/main/java/gregtech/api/util/GT_ProcessingArray_Manager.java
index 0d2c407e..d048f1f8 100644
--- a/src/main/java/gregtech/api/util/GT_ProcessingArray_Manager.java
+++ b/src/main/java/gregtech/api/util/GT_ProcessingArray_Manager.java
@@ -18,7 +18,9 @@ public class GT_ProcessingArray_Manager {
 		}	
 		String aMapNameKey = aMap.mUnlocalizedName;		
 		mMetaKeyMap.put(aMeta, aMapNameKey);
-		mRecipeCache.put(aMapNameKey, aMap);	
+		if (!mRecipeCache.containsKey(aMapNameKey)) {
+			mRecipeCache.put(aMapNameKey, aMap);			
+		}	
 		return true;
 	}