diff --git a/src/libsystemd/sd-bus/bus-protocol.h b/src/libsystemd/sd-bus/bus-protocol.h
index 5046d17a10..4f4646883c 100644
--- a/src/libsystemd/sd-bus/bus-protocol.h
+++ b/src/libsystemd/sd-bus/bus-protocol.h
@@ -21,6 +21,7 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
+#include <endian.h>
 
 /* Endianness */
 
diff --git a/src/shared/architecture.h b/src/shared/architecture.h
index 58e97e5744..38780d1601 100644
--- a/src/shared/architecture.h
+++ b/src/shared/architecture.h
@@ -21,6 +21,8 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
+#include <endian.h>
+
 #include "util.h"
 
 /* A cleaned up architecture definition. We don't want to get lost in
diff --git a/src/shared/gpt.h b/src/shared/gpt.h
index 278940bf03..ef3444f6ea 100644
--- a/src/shared/gpt.h
+++ b/src/shared/gpt.h
@@ -19,6 +19,8 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
+#include <endian.h>
+
 #include "sd-id128.h"
 
 /* We only support root disk discovery for x86, x86-64 and ARM for