diff --git a/src/basic/capability-util.c b/src/basic/capability-util.c
index a3f3ca9f52..b944ee6ea1 100644
--- a/src/basic/capability-util.c
+++ b/src/basic/capability-util.c
@@ -13,6 +13,7 @@
 #include "fileio.h"
 #include "log.h"
 #include "macro.h"
+#include "missing_prctl.h"
 #include "parse-util.h"
 #include "user-util.h"
 #include "util.h"
diff --git a/src/test/test-capability.c b/src/test/test-capability.c
index dae85f2f91..325d7c8cc2 100644
--- a/src/test/test-capability.c
+++ b/src/test/test-capability.c
@@ -13,6 +13,7 @@
 #include "fd-util.h"
 #include "fileio.h"
 #include "macro.h"
+#include "missing_prctl.h"
 #include "parse-util.h"
 #include "tests.h"
 #include "util.h"
diff --git a/src/test/test-execute.c b/src/test/test-execute.c
index 2115061add..cea68b8cfe 100644
--- a/src/test/test-execute.c
+++ b/src/test/test-execute.c
@@ -13,6 +13,7 @@
 #include "fs-util.h"
 #include "macro.h"
 #include "manager.h"
+#include "missing_prctl.h"
 #include "mkdir.h"
 #include "path-util.h"
 #include "rm-rf.h"