diff --git a/src/XMLRequest/XMLRequestParser.cc b/src/XMLRequest/XMLRequestParser.cc
index ed115da..210492a 100644
--- a/src/XMLRequest/XMLRequestParser.cc
+++ b/src/XMLRequest/XMLRequestParser.cc
@@ -176,7 +176,12 @@ public:
 	  if (lTTIndex)
 	  {
 		  //Add only interval designate by index
-		  size_t index = atoi( (const char*)lTTIndex );
+		  int tmpIndex = atoi( (const char*)lTTIndex );
+		  size_t index;
+		  if(tmpIndex == -1)
+			index = lTimeIntervalList.size() -1;
+		  else
+		  	index = (size_t)tmpIndex;
 
 		  xmlFree(lTTIndex);
 
@@ -262,7 +267,12 @@ public:
 	  if (lCatalogIndex)
 	  {
 		  //Add only interval designate by index
-		  size_t index = atoi( (const char*)lCatalogIndex );
+		  int tmpIndex = atoi( (const char*)lCatalogIndex );
+		  size_t index;
+		  if(tmpIndex == -1)
+			index = lTimeIntervalList.size() -1;
+		  else
+		  	index = (size_t)tmpIndex;
 
 		  xmlFree(lCatalogIndex);
 
--
libgit2 0.21.2