diff --git a/openssl-sys/build.rs b/openssl-sys/build.rs
index 5f9348889b5456d5dde0265ffe555e06ab1184bb..aa47f2def336b5e84f288f064856519f075897d1 100644
--- a/openssl-sys/build.rs
+++ b/openssl-sys/build.rs
@@ -62,6 +62,7 @@ fn main() {
     let mut include_dirs = vec![];
 
     if let Some(include_dir) = include_dir {
+        println!("cargo:include={}", include_dir);
         include_dirs.push(PathBuf::from(&include_dir));
     }