diff --git a/src/main/java/it/inaf/oats/vospace/exception/NodeBusyException.java b/src/main/java/it/inaf/oats/vospace/exception/NodeBusyException.java
index 7e0d8fc3d58e538de3f56e5253f03ebf00fdf277..dd4e4d54d00731e49c4b1f8d95e22250ff95e6bf 100644
--- a/src/main/java/it/inaf/oats/vospace/exception/NodeBusyException.java
+++ b/src/main/java/it/inaf/oats/vospace/exception/NodeBusyException.java
@@ -5,6 +5,10 @@
  */
 package it.inaf.oats.vospace.exception;
 
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(value = HttpStatus.UNPROCESSABLE_ENTITY)
 public class NodeBusyException extends VoSpaceErrorSummarizableException {
 
     public NodeBusyException(String path) {
diff --git a/src/main/java/it/inaf/oats/vospace/exception/ProtocolNotSupportedException.java b/src/main/java/it/inaf/oats/vospace/exception/ProtocolNotSupportedException.java
index 6a767964c4bd9c5465d591f9663c1e0a450800fc..8b927faf2b60139c7fd68d29a7418edffc773426 100644
--- a/src/main/java/it/inaf/oats/vospace/exception/ProtocolNotSupportedException.java
+++ b/src/main/java/it/inaf/oats/vospace/exception/ProtocolNotSupportedException.java
@@ -5,6 +5,10 @@
  */
 package it.inaf.oats.vospace.exception;
 
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(value = HttpStatus.BAD_REQUEST)
 public class ProtocolNotSupportedException extends VoSpaceErrorSummarizableException{
     
     public ProtocolNotSupportedException(String protocol) {