1 files changed, 1 insertions, 1 deletions

diff --git a/include/asm-s390/ptrace.h b/include/asm-s390/ptrace.h
index 4eff8f2e3bf1..fc7c96edc697 100644
--- a/include/asm-s390/ptrace.h
+++ b/include/asm-s390/ptrace.h
@@ -276,7 +276,7 @@ typedef struct
 #endif /* __s390x__ */
 
 #define PSW_KERNEL_BITS (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY | \
-                         PSW_DEFAULT_KEY)
+                         PSW_MASK_MCHECK | PSW_DEFAULT_KEY)
 #define PSW_USER_BITS   (PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | \
                          PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | \
                          PSW_MASK_PSTATE | PSW_DEFAULT_KEY)