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-rw-r--r--target-s390x/ioinst.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/target-s390x/ioinst.c b/target-s390x/ioinst.c
index 0dc258fe3c..098bd8d5d3 100644
--- a/target-s390x/ioinst.c
+++ b/target-s390x/ioinst.c
@@ -688,7 +688,7 @@ int ioinst_handle_schm(CPUS390XState *env, uint64_t reg1, uint64_t reg2,
update = SCHM_REG1_UPD(reg1);
dct = SCHM_REG1_DCT(reg1);
- if (update && (reg2 & 0x0000000000000fff)) {
+ if (update && (reg2 & 0x000000000000001f)) {
program_interrupt(env, PGM_OPERAND, 2);
return -EIO;
}