diff --git a/src/systemd/sd-dhcp-relay.h b/src/systemd/sd-dhcp-relay.h
index 47c42a21dd..ae8c8c8007 100644
--- a/src/systemd/sd-dhcp-relay.h
+++ b/src/systemd/sd-dhcp-relay.h
@@ -17,13 +17,13 @@
   along with systemd; If not, see <https://www.gnu.org/licenses/>.
 ***/
 
-#include <netinet/in.h>
-#include <sys/uio.h>
-
 #include "_sd-common.h"
 
 _SD_BEGIN_DECLARATIONS;
 
+struct in_addr;
+struct iovec;
+
 typedef struct sd_event sd_event;
 typedef struct sd_dhcp_relay sd_dhcp_relay;
 typedef struct sd_dhcp_relay_interface sd_dhcp_relay_interface;