Include <functional> where needed

diff --git a/pdns/mtasker_context.hh b/pdns/mtasker_context.hh
index dc98686a01d22177c47e88fe28f42b93090dfb44..2884c696712dab0868128727f0bdac6f08dee1a8 100644 (file)
--- a/pdns/mtasker_context.hh
+++ b/pdns/mtasker_context.hh
@@ -23,6 +23,7 @@
 #include "lazy_allocator.hh"
 #include <vector>
 #include <exception>
+#include <functional>
 
 struct pdns_ucontext_t {
     pdns_ucontext_t ();