diff --git a/tests/termios_test.cpp b/tests/termios_test.cpp
index 480f3af..19e9bfe 100644
--- a/tests/termios_test.cpp
+++ b/tests/termios_test.cpp
@@ -96,7 +96,7 @@
   EXPECT_EQ(0U, (t.c_oflag & OPOST));
   EXPECT_EQ(0U, (t.c_lflag & (ECHO|ECHONL|ICANON|ISIG|IEXTEN)));
   EXPECT_EQ(0U, (t.c_cflag & PARENB));
-  EXPECT_EQ(CS8, static_cast<int>(t.c_cflag & CSIZE));
+  EXPECT_EQ(static_cast<unsigned>(CS8), (t.c_cflag & CSIZE));
   EXPECT_EQ(1, t.c_cc[VMIN]);
   EXPECT_EQ(0, t.c_cc[VTIME]);
 }