1 files changed, 4 insertions, 2 deletions

diff --git a/miscutils/microcom.c b/miscutils/microcom.c
index 5e29a1acd..5eb2e6743 100644
--- a/miscutils/microcom.c
+++ b/miscutils/microcom.c
@@ -19,6 +19,7 @@
 //usage:     "\n        -X      Disable special meaning of NUL and Ctrl-X from stdin"
 
 #include "libbb.h"
+#include "common_bufsiz.h"
 
 // set raw tty mode
 static void xget1(int fd, struct termios *t, struct termios *oldt)
@@ -155,10 +156,11 @@ int microcom_main(int argc UNUSED_PARAM, char **argv)
 skip_write: ;
                 }
                 if (pfd[0].revents) {
-#define iobuf bb_common_bufsiz1
+#define        iobuf bb_common_bufsiz1
+#define sizeof_iobuf COMMON_BUFSIZE
                         ssize_t len;
                         // read from device -> write to stdout
-                        len = safe_read(sfd, iobuf, sizeof(iobuf));
+                        len = safe_read(sfd, iobuf, sizeof_iobuf);
                         if (len > 0)
                                 full_write(STDOUT_FILENO, iobuf, len);
                         else {