diff --git a/src/backend/concrete_history.cc b/src/backend/concrete_history.cc
index 6e8c119..eb1bd22 100644
--- a/src/backend/concrete_history.cc
+++ b/src/backend/concrete_history.cc
@@ -161,7 +161,7 @@ ConcreteHistory::remove(resource_key_t resource_key)
 						{
 							typedef std::vector<DynamicSubRequest*> SubRequests;
 							SubRequests& subr = (*it3)->get_dynamic_subrequests();
-							for(SubRequests::iterator it4; it4 != subr.end(); it4++)
+							for(SubRequests::iterator it4 = subr.begin(); it4 != subr.end(); it4++)
 								{
 									if((*it4)->get_resource_key() == resource_key)
 										{