diff --git a/AUTHORS b/AUTHORS
index 8c15b87f..391434ca 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -25,6 +25,7 @@ Jussi Knuuttila <jussi.knuuttila@gmail.com>
 Kaito Udagawa <umireon@gmail.com>
 Lei Xu <eddyxu@gmail.com>
 Matt Clarkson <mattyclarkson@gmail.com>
+Maxim Vafin <maxvafin@gmail.com>
 Nick Hutchinson <nshutchinson@gmail.com>
 Oleksandr Sochka <sasha.sochka@gmail.com>
 Paul Redmond <paul.redmond@gmail.com>
diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 96cd15a0..0f7f6ed1 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -41,6 +41,7 @@ Kaito Udagawa <umireon@gmail.com>
 Kai Wolf <kai.wolf@gmail.com>
 Lei Xu <eddyxu@gmail.com>
 Matt Clarkson <mattyclarkson@gmail.com>
+Maxim Vafin <maxvafin@gmail.com>
 Nick Hutchinson <nshutchinson@gmail.com>
 Oleksandr Sochka <sasha.sochka@gmail.com>
 Pascal Leroy <phl@google.com>
diff --git a/src/sysinfo.cc b/src/sysinfo.cc
index 34f9871c..7feb79e6 100644
--- a/src/sysinfo.cc
+++ b/src/sysinfo.cc
@@ -75,7 +75,9 @@ bool ReadIntFromFile(const char* file, long* value) {
     char line[1024];
     char* err;
     memset(line, '\0', sizeof(line));
-    CHECK(read(fd, line, sizeof(line) - 1));
+    ssize_t read_err = read(fd, line, sizeof(line) - 1);
+    ((void)read_err); // prevent unused warning
+    CHECK(read_err >= 0);
     const long temp_value = strtol(line, &err, 10);
     if (line[0] != '\0' && (*err == '\n' || *err == '\0')) {
       *value = temp_value;