diff --git a/src/Sessions.cc b/src/Sessions.cc
index d3042784a0..7639152ab0 100644
--- a/src/Sessions.cc
+++ b/src/Sessions.cc
@@ -3,6 +3,7 @@
 
 #include "zeek-config.h"
 
+#include <netinet/in.h>
 #include <arpa/inet.h>
 
 #include <stdlib.h>
diff --git a/src/analyzer/protocol/dns/DNS.cc b/src/analyzer/protocol/dns/DNS.cc
index 5c35e4f271..eab5b48461 100644
--- a/src/analyzer/protocol/dns/DNS.cc
+++ b/src/analyzer/protocol/dns/DNS.cc
@@ -5,6 +5,7 @@
 #include <ctype.h>
 #include <sys/types.h>
 #include <sys/socket.h>
+#include <netinet/in.h>
 #include <arpa/inet.h>
 
 #include "NetVar.h"