diff --git a/src/lib.rs b/src/lib.rs
index 1f2de4e..197568f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -72,7 +72,7 @@ mod setup_config;
 pub mod windows_registry;
 
 /// Extra configuration to pass to gcc.
-#[derive(Clone, Debug, Default)]
+#[derive(Clone, Debug)]
 pub struct Config {
     include_directories: Vec<PathBuf>,
     definitions: Vec<(String, Option<String>)>,
@@ -1187,6 +1187,12 @@ impl Config {
     }
 }
 
+impl Default for Config {
+    fn default() -> Config {
+        Config::new()
+    }
+}
+
 impl Tool {
     fn new(path: PathBuf) -> Tool {
         // Try to detect family of the tool from its name, falling back to Gnu.