diff --git a/src/driver.rs b/src/driver.rs
index ab5e90141a9..df0ff4c3f1f 100644
--- a/src/driver.rs
+++ b/src/driver.rs
@@ -129,7 +129,7 @@ fn show_version() {
 pub fn main() {
     use std::env;
 
-    if env::var("CLIPPY_DOGFOOD").map(|_| true).unwrap_or(false) {
+    if env::var("CLIPPY_DOGFOOD").is_ok() {
         panic!("yummy");
     }
 
diff --git a/src/main.rs b/src/main.rs
index 69f416e2092..11ae135bfa9 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -51,7 +51,7 @@ fn show_version() {
 pub fn main() {
     use std::env;
 
-    if env::var("CLIPPY_DOGFOOD").map(|_| true).unwrap_or(false) {
+    if env::var("CLIPPY_DOGFOOD").is_ok() {
         panic!("yummy");
     }