diff --git a/std/std.zig b/std/std.zig
index 6eae224f3f..94a12fc0e6 100644
--- a/std/std.zig
+++ b/std/std.zig
@@ -1,5 +1,5 @@
 import "syscall.zig";
-//import "errno.zig";
+import "errno.zig";
 
 pub const stdin_fileno : isize = 0;
 pub const stdout_fileno : isize = 1;
diff --git a/test/run_tests.cpp b/test/run_tests.cpp
index 6457395e44..a48120ef63 100644
--- a/test/run_tests.cpp
+++ b/test/run_tests.cpp
@@ -1207,6 +1207,25 @@ pub fn main(args: [][]u8) i32 => {
     return 0;
 }
     )SOURCE", "OK\n");
+
+    add_simple_case("const number literal", R"SOURCE(
+import "std.zig";
+
+const ten = 10;
+
+pub fn main(args: [][]u8) i32 => {
+    const one = 1;
+    const eleven = ten + one;
+
+    if (eleven != 11) {
+        print_str("BAD\n");
+    }
+
+    print_str("OK\n");
+    return 0;
+}
+    )SOURCE", "OK\n");
+
 }