diff --git a/sysdeps/htl/flockfile.c b/sysdeps/htl/flockfile.c
index 7d475e6e29..956b8b4128 100644
--- a/sysdeps/htl/flockfile.c
+++ b/sysdeps/htl/flockfile.c
@@ -17,7 +17,7 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <stdio.h>
-#include <libc-lock.h>
+#include <libc-lockP.h>
 
 
 void
diff --git a/sysdeps/htl/ftrylockfile.c b/sysdeps/htl/ftrylockfile.c
index a467545647..a99cdedb0d 100644
--- a/sysdeps/htl/ftrylockfile.c
+++ b/sysdeps/htl/ftrylockfile.c
@@ -16,10 +16,8 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <errno.h>
-#include <pthread.h>
 #include <stdio.h>
-#include <stdio-lock.h>
+#include <libc-lockP.h>
 
 
 int
diff --git a/sysdeps/htl/funlockfile.c b/sysdeps/htl/funlockfile.c
index 70f6f2e773..0b59efaa35 100644
--- a/sysdeps/htl/funlockfile.c
+++ b/sysdeps/htl/funlockfile.c
@@ -16,9 +16,8 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <pthread.h>
 #include <stdio.h>
-#include <stdio-lock.h>
+#include <libc-lockP.h>
 
 
 void