diff --git a/src/main/java/org/apache/commons/collections4/bloomfilter/BloomFilterExtractor.java b/src/main/java/org/apache/commons/collections4/bloomfilter/BloomFilterExtractor.java
index e5f5a6aa7..33d84d8f4 100644
--- a/src/main/java/org/apache/commons/collections4/bloomfilter/BloomFilterExtractor.java
+++ b/src/main/java/org/apache/commons/collections4/bloomfilter/BloomFilterExtractor.java
@@ -105,7 +105,7 @@ public interface BloomFilterExtractor {
             if (bf[0] == null) {
                 bf[0] = new SimpleBloomFilter( x.getShape());
             }
-            return bf[0].merge( x );
+            return bf[0].merge(x);
         });
         return bf[0];
     }