diff --git a/lucene/core/src/java/org/apache/lucene/store/MMapDirectory.java b/lucene/core/src/java/org/apache/lucene/store/MMapDirectory.java
index 0487400c776..b994d0d3036 100644
--- a/lucene/core/src/java/org/apache/lucene/store/MMapDirectory.java
+++ b/lucene/core/src/java/org/apache/lucene/store/MMapDirectory.java
@@ -386,7 +386,7 @@ public class MMapDirectory extends FSDirectory {
           " [Please grant at least the following permissions: RuntimePermission(\"accessClassInPackage.sun.misc\") " +
           " and ReflectPermission(\"suppressAccessChecks\")]";
     } catch (ReflectiveOperationException | RuntimeException e) {
-      return "Unmapping is not supported on this platform, because internal Java APIs are not compatible to this Lucene version: " + e; 
+      return "Unmapping is not supported on this platform, because internal Java APIs are not compatible with this Lucene version: " + e; 
     }
   }