diff --git a/core/src/main/java/org/dcache/nfs/v4/OperationREAD.java b/core/src/main/java/org/dcache/nfs/v4/OperationREAD.java
index 2909a34b..7d0e731f 100644
--- a/core/src/main/java/org/dcache/nfs/v4/OperationREAD.java
+++ b/core/src/main/java/org/dcache/nfs/v4/OperationREAD.java
@@ -75,7 +75,7 @@ public void process(CompoundContext context, nfs_resop4 result) throws IOExcepti
 
         int bytesReaded = context.getFs().read(context.currentInode(), buf, offset);
         if (bytesReaded < 0) {
-            throw new NfsIoException("IO not allowd");
+            throw new NfsIoException("IO not allowed");
         }
 
         buf.flip();