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-rw-r--r--src/common/dns_utils.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/common/dns_utils.h b/src/common/dns_utils.h
index 61e1358ca..f19584516 100644
--- a/src/common/dns_utils.h
+++ b/src/common/dns_utils.h
@@ -29,6 +29,7 @@
#include <vector>
#include <string>
+#include <functional>
namespace tools
{