diff --git a/Cargo.lock b/Cargo.lock
index 91aa29d..6c4a856 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1041,9 +1041,9 @@ dependencies = [
 
 [[package]]
 name = "rust_util"
-version = "0.6.3"
+version = "0.6.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e9cf201657d8553fd7eddf4c20e00b1bdebca40e9fa2ede5c87f6874d02750f"
+checksum = "782e73fb85259a3ac96cca39222b3f6c9ea507eea5d700b345d3f264fc34e860"
 dependencies = [
  "lazy_static",
  "libc",
diff --git a/src/main.rs b/src/main.rs
index cd1f7a6..2c6016e 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,6 @@
 #[macro_use] extern crate lazy_static;
 #[macro_use] extern crate log;
+#[macro_use] extern crate rust_util;
 
 use std::collections::HashMap;
 use std::{fs, panic, thread};
@@ -43,15 +44,6 @@ lazy_static!{
     static ref CHECK_FAIL_MAP: Mutex<HashMap<String, u64>> = Mutex::new(HashMap::new());
 }
 
-macro_rules! opt_value {
-    ($e: expr) => {
-        match $e {
-            Some(o) => o,
-            None => return,
-        }
-    }
-}
-
 fn main() {
     panic::set_hook(Box::new(|panic_info| {
         error!("Panic in running keeprunningd: {:?}", panic_info);