diff --git a/include/boot/boot_defs.h b/include/boot/boot_defs.h
index 2116f99b..7feee015 100644
--- a/include/boot/boot_defs.h
+++ b/include/boot/boot_defs.h
@@ -13,6 +13,9 @@
 
 #include "lib/zt_common.h"
 
+#define ZIPL_MAGIC			"zIPL"
+#define ZIPL_MAGIC_SIZE			4
+
 /*
  * ECKD dump parameter
  */
diff --git a/zipl/include/zipl.h b/zipl/include/zipl.h
index 50003a9d..d02c3202 100644
--- a/zipl/include/zipl.h
+++ b/zipl/include/zipl.h
@@ -17,9 +17,6 @@
 #include "lib/util_base.h"
 #include "boot/loaders_layout.h"
 
-#define ZIPL_MAGIC			"zIPL"
-#define ZIPL_MAGIC_SIZE			4
-
 #define ADDRESS_LIMIT			0x80000000UL
 #define UNSPECIFIED_ADDRESS		-1UL
 #define LEGACY_MAXIMUM_PARMLINE_SIZE	0x380UL