diff --git a/updater/blockimg.cpp b/updater/blockimg.cpp
index e93196b..b44e1a2 100644
--- a/updater/blockimg.cpp
+++ b/updater/blockimg.cpp
@@ -1499,10 +1499,12 @@
       // length in bytes
       blocks[1] = (range.second - range.first) * static_cast<uint64_t>(BLOCKSIZE);
 
+#ifndef SUPPRESS_EMMC_WIPE
       if (ioctl(params.fd, BLKDISCARD, &blocks) == -1) {
         PLOG(ERROR) << "BLKDISCARD ioctl failed";
         return -1;
       }
+#endif
     }
   }