--- a/contrib/s390/dfltcc.c

+++ b/contrib/s390/dfltcc.c

@@ -623,7 +623,7 @@

     state->bits = param->sbb;

     state->whave = param->hl;

     state->wnext = (param->ho + param->hl) & ((1 << HB_BITS) - 1);

-    state->check = state->flags ? ZSWAP32(param->cv) : param->cv;

+    strm->adler = state->check = state->flags ? ZSWAP32(param->cv) : param->cv;

     if (cc == DFLTCC_CC_OP2_CORRUPT && param->oesc != 0) {

         /* Report an error if stream is corrupted */

         state->mode = BAD;