diff --git a/configure.ac b/configure.ac
index e97da02e..283a38d7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -230,7 +230,7 @@ case $host_os in
     *solaris*)
         LIBS="$LIBS -lssp -lsocket -lnsl"
     ;;
-    *freebsd*)
+    *freebsd*|*openbsd*)
         LDFLAGS="$LDFLAGS -L/usr/local/lib"
         CFLAGS="$CFLAGS -I/usr/local/include"
         CPPFLAGS="$CPPFLAGS -I/usr/local/include"
diff --git a/toxcore/tox.h b/toxcore/tox.h
index dfb5ecd1..d94c0e13 100644
--- a/toxcore/tox.h
+++ b/toxcore/tox.h
@@ -46,6 +46,9 @@
 #else
 
 #include <sys/types.h>
+#ifdef __OpenBSD__
+#include <netinet/in_systm.h>
+#endif
 #include <netinet/in.h>
 #include <netinet/ip.h>