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-rw-r--r--include/hw/s390x/css.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/hw/s390x/css.h b/include/hw/s390x/css.h
index 1da63e361d..c96c862057 100644
--- a/include/hw/s390x/css.h
+++ b/include/hw/s390x/css.h
@@ -20,7 +20,7 @@
 #define MAX_DEVNO 65535
 #define MAX_SCHID 65535
 #define MAX_SSID 3
-#define MAX_CSSID 254 /* 255 is reserved */
+#define MAX_CSSID 255
 #define MAX_CHPID 255
 
 #define MAX_CIWS 62