diff --git a/Cargo.lock b/Cargo.lock
index 80ffa8d..d62a228 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -31,6 +31,11 @@ name = "bitflags"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "cfg-if"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "clap"
 version = "2.29.2"
@@ -99,6 +104,7 @@ version = "0.4.0"
 dependencies = [
  "approx 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "atty 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.29.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "colored 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "indicatif 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -416,6 +422,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum approx 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "08abcc3b4e9339e33a3d0a5ed15d84a687350c05689d825e0f6655eef9e76a94"
 "checksum atty 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "8352656fd42c30a0c3c89d26dea01e3b77c0ab2af18230835c15e2e13cd51859"
 "checksum bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b3c30d3802dfb7281680d6285f2ccdaa8c2d8fee41f93805dba5c4cf50dc23cf"
+"checksum cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "d4c819a1287eb618df47cc647173c5c4c66ba19d888a6e50d605672aed3140de"
 "checksum clap 2.29.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4151c5790817c7d21bbdc6c3530811f798172915f93258244948b93ba19604a6"
 "checksum clicolors-control 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1f84dec9bc083ce2503908cd305af98bd363da6f54bf8d4bf0ac14ee749ad5d1"
 "checksum colored 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b0aa3473e85a3161b59845d6096b289bb577874cafeaf75ea1b1beaa6572c7fc"
diff --git a/Cargo.toml b/Cargo.toml
index 7354282..d73556f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,6 +14,7 @@ colored = "1.6"
 indicatif = "0.9"
 statistical = "0.1"
 atty = "0.2.2"
+cfg-if = "0.1.2"
 
 [target.'cfg(not(windows))'.dependencies]
 libc = "0.2"
diff --git a/src/hyperfine/timer/mod.rs b/src/hyperfine/timer/mod.rs
index 2e99d37..9fe26bf 100644
--- a/src/hyperfine/timer/mod.rs
+++ b/src/hyperfine/timer/mod.rs
@@ -2,25 +2,16 @@ mod internal;
 
 pub mod wallclocktimer;
 
-#[cfg(not(windows))]
-mod unix_timer;
-
-#[cfg(not(windows))]
-pub use self::unix_timer::get_cpu_timer;
-
-#[cfg(windows)]
-mod windows_timer;
-
-#[cfg(windows)]
-pub use self::windows_timer::get_cpu_timer;
-
-use std::process::Child;
-
-pub trait Timer
-where
-    Self: TimerStart + TimerStop,
-{
+cfg_if! {
+    if #[cfg(windows)] {
+        mod windows_timer;
+        pub use self::windows_timer::get_cpu_timer;
+    } else {
+        mod unix_timer;
+        pub use self::unix_timer::get_cpu_timer;
+    }
 }
+use std::process::Child;
 
 /// Defines start functionality of a timer.
 pub trait TimerStart {
diff --git a/src/main.rs b/src/main.rs
index 27e2542..952ab16 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,15 +1,21 @@
 extern crate atty;
+
+#[macro_use]
+extern crate cfg_if;
+
 #[macro_use]
 extern crate clap;
 extern crate colored;
 extern crate indicatif;
 extern crate statistical;
 
-#[cfg(not(windows))]
-extern crate libc;
-
-#[cfg(windows)]
-extern crate winapi;
+cfg_if! {
+    if #[cfg(windows)] {
+        extern crate winapi;
+    } else {
+        extern crate libc;
+    }
+}
 
 #[cfg(test)]
 #[macro_use]