1 files changed, 6 insertions, 2 deletions
diff --git a/pc-bios/s390-ccw/bootmap.h b/pc-bios/s390-ccw/bootmap.h
index 486c0f34f1..b361084073 100644
--- a/pc-bios/s390-ccw/bootmap.h
+++ b/pc-bios/s390-ccw/bootmap.h
@@ -32,10 +32,14 @@ typedef struct FbaBlockPtr {
     uint16_t blockct;
 } __attribute__ ((packed)) FbaBlockPtr;
 
-typedef struct EckdBlockPtr {
-    uint16_t cylinder; /* cylinder/head/sector is an address of the block */
+typedef struct EckdCHS {
+    uint16_t cylinder;
     uint16_t head;
     uint8_t sector;
+} __attribute__ ((packed)) EckdCHS;
+
+typedef struct EckdBlockPtr {
+    EckdCHS chs; /* cylinder/head/sector is an address of the block */
     uint16_t size;
     uint8_t count; /* (size_in_blocks-1);
                     * it's 0 for TablePtr, ScriptPtr, and SectionPtr */