diff --git a/src/main/java/org/apache/commons/collections4/MapUtils.java b/src/main/java/org/apache/commons/collections4/MapUtils.java
index 052375da27..c3f7f0c46b 100644
--- a/src/main/java/org/apache/commons/collections4/MapUtils.java
+++ b/src/main/java/org/apache/commons/collections4/MapUtils.java
@@ -1185,7 +1185,7 @@ public static <K> String getString(final Map<? super K, ?> map, final K key, fin
      */
     public static <K, V> Map<V, K> invertMap(final Map<K, V> map) {
         Objects.requireNonNull(map, "map");
-        final Map<V, K> out = new HashMap<>(map.size());
+        final Map<V, K> out = new HashMap<>((int) Math.ceil(map.size() / 0.75d));
         for (final Entry<K, V> entry : map.entrySet()) {
             out.put(entry.getValue(), entry.getKey());
         }