1 files changed, 7 insertions, 1 deletions
diff --git a/extcap.c b/extcap.c
index 179a2cd6a7..d0d527ffb1 100644
--- a/extcap.c
+++ b/extcap.c
@@ -1070,10 +1070,16 @@ void extcap_if_cleanup(capture_options *capture_opts, gchar **errormsg)
 #ifdef _WIN32
                 win32_readfrompipe((HANDLE)_get_osfhandle(userdata->extcap_stderr_rd), STDERR_BUFFER_SIZE, buffer);
 #else
-                if (read(userdata->extcap_stderr_rd, buffer, sizeof(gchar) * STDERR_BUFFER_SIZE) <= 0)
+                ssize_t buffer_len;
+                buffer_len = read(userdata->extcap_stderr_rd, buffer, sizeof(gchar) * STDERR_BUFFER_SIZE);
+                if (buffer_len <= 0)
                 {
                     buffer[0] = '\0';
                 }
+                else
+                {
+                    buffer[buffer_len] = '\0';
+                }
 #endif
                 if (strlen(buffer) > 0)
                 {