diff --git a/coin_cbc_sys/build.rs b/coin_cbc_sys/build.rs
index 950e687..50ad811 100644
--- a/coin_cbc_sys/build.rs
+++ b/coin_cbc_sys/build.rs
@@ -1,5 +1,5 @@
 extern crate pkg_config;
 
 fn main() {
-    let _ = pkg_config::probe_library("cbc");
+    pkg_config::probe_library("cbc").unwrap();
 }