diff --git a/zipl/boot/s390.h b/zipl/boot/s390.h
index ec7c321c..886233b9 100644
--- a/zipl/boot/s390.h
+++ b/zipl/boot/s390.h
@@ -12,7 +12,6 @@
 #define S390_H
 
 #include "lib/zt_common.h"
-#include "libc.h"
 #include "boot/sigp.h"
 
 
diff --git a/zipl/boot/sclp.c b/zipl/boot/sclp.c
index 04006b25..817b87a1 100644
--- a/zipl/boot/sclp.c
+++ b/zipl/boot/sclp.c
@@ -9,6 +9,7 @@
  * it under the terms of the MIT license. See LICENSE for details.
  */
 
+#include "libc.h"
 #include "error.h"
 #include "s390.h"
 #include "sclp.h"
diff --git a/zipl/boot/sclp_stage3.c b/zipl/boot/sclp_stage3.c
index 2b216de1..9acb6700 100644
--- a/zipl/boot/sclp_stage3.c
+++ b/zipl/boot/sclp_stage3.c
@@ -9,6 +9,7 @@
  * it under the terms of the MIT license. See LICENSE for details.
  */
 
+#include "libc.h"
 #include "sclp.h"
 #include "sclp_stage3.h"
 
diff --git a/zipl/boot/stage2dump.c b/zipl/boot/stage2dump.c
index effed413..9ba5d485 100644
--- a/zipl/boot/stage2dump.c
+++ b/zipl/boot/stage2dump.c
@@ -13,6 +13,7 @@
 
 #include "lib/zt_common.h"
 
+#include "libc.h"
 #include "error.h"
 #include "sclp.h"
 #include "stage2dump.h"