1 files changed, 3 insertions, 3 deletions

diff --git a/miscutils/microcom.c b/miscutils/microcom.c
index 5eb2e6743..d9e8f9187 100644
--- a/miscutils/microcom.c
+++ b/miscutils/microcom.c
@@ -156,11 +156,11 @@ int microcom_main(int argc UNUSED_PARAM, char **argv)
 skip_write: ;
                 }
                 if (pfd[0].revents) {
-#define        iobuf bb_common_bufsiz1
-#define sizeof_iobuf COMMON_BUFSIZE
                         ssize_t len;
+#define iobuf bb_common_bufsiz1
+                        setup_common_bufsiz();
                         // read from device -> write to stdout
-                        len = safe_read(sfd, iobuf, sizeof_iobuf);
+                        len = safe_read(sfd, iobuf, COMMON_BUFSIZE);
                         if (len > 0)
                                 full_write(STDOUT_FILENO, iobuf, len);
                         else {