diff --git a/apis/filesystem/src/main/java/org/jclouds/filesystem/predicates/validators/internal/FilesystemBlobKeyValidatorImpl.java b/apis/filesystem/src/main/java/org/jclouds/filesystem/predicates/validators/internal/FilesystemBlobKeyValidatorImpl.java
index 60a5721113..563968edcc 100644
--- a/apis/filesystem/src/main/java/org/jclouds/filesystem/predicates/validators/internal/FilesystemBlobKeyValidatorImpl.java
+++ b/apis/filesystem/src/main/java/org/jclouds/filesystem/predicates/validators/internal/FilesystemBlobKeyValidatorImpl.java
@@ -39,7 +39,7 @@ public class FilesystemBlobKeyValidatorImpl extends FilesystemBlobKeyValidator {
         if (name.startsWith("\\") || name.startsWith("/"))
             throw new IllegalArgumentException("Blob key '" + name + "' cannot start with \\ or /");
         if (name.contains("../"))
-            throw new IllegalArgumentException("Blob key '" + name + "' cannot contains ../");
+            throw new IllegalArgumentException("Blob key '" + name + "' cannot contain ../");
     }
 
 }