diff --git a/src/net/StaticSocketAddress.cxx b/src/net/StaticSocketAddress.cxx
index d74df016c..b9bd01aeb 100644
--- a/src/net/StaticSocketAddress.cxx
+++ b/src/net/StaticSocketAddress.cxx
@@ -27,6 +27,7 @@
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include "config.h"
 #include "StaticSocketAddress.hxx"
 
 #include <algorithm>