diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000000..fa8d85ac52
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+Cargo.lock
+target
diff --git a/src/main.rs b/src/main.rs
index de9a8dc4f9..95c5651361 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -13,7 +13,7 @@ use rand::Rng;
 
 use raw_cpuid::CpuId;
 
-use syscall::{Error, Result, SchemeMut, MODE_CHR};
+use syscall::{Error, Result, SchemeMut, EINVAL, MODE_CHR};
 use syscall::data::{Packet, Stat};
 
 //TODO: Use a CSPRNG, allow write of entropy