diff --git a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
index 2460bf79a83..6a60a2397ce 100644
--- a/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
+++ b/src/java.base/share/classes/java/util/concurrent/ConcurrentSkipListMap.java
@@ -3165,7 +3165,7 @@ public class ConcurrentSkipListMap<K,V> extends AbstractMap<K,V>
                         current = n;
                         Index<K,V> r = q.down;
                         row = (s.right != null) ? s : s.down;
-                        est -= est >>> 2;
+                        est >>>= 1;
                         return new KeySpliterator<K,V>(cmp, r, e, sk, est);
                     }
                 }
@@ -3255,7 +3255,7 @@ public class ConcurrentSkipListMap<K,V> extends AbstractMap<K,V>
                         current = n;
                         Index<K,V> r = q.down;
                         row = (s.right != null) ? s : s.down;
-                        est -= est >>> 2;
+                        est >>>= 1;
                         return new ValueSpliterator<K,V>(cmp, r, e, sk, est);
                     }
                 }
@@ -3341,7 +3341,7 @@ public class ConcurrentSkipListMap<K,V> extends AbstractMap<K,V>
                         current = n;
                         Index<K,V> r = q.down;
                         row = (s.right != null) ? s : s.down;
-                        est -= est >>> 2;
+                        est >>>= 1;
                         return new EntrySpliterator<K,V>(cmp, r, e, sk, est);
                     }
                 }