diff --git a/openssl-sys/build.rs b/openssl-sys/build.rs
index 391e75b1..c5968407 100644
--- a/openssl-sys/build.rs
+++ b/openssl-sys/build.rs
@@ -295,7 +295,7 @@ The build is now aborting due to this version mismatch.
                 vars.push(var);
             }
         }
-        println!("cargo:osslconf={}", vars.join(","));
+        println!("cargo:conf={}", vars.join(","));
     }
 
     return version_text.to_string()
diff --git a/openssl/build.rs b/openssl/build.rs
index 41847b0f..7a0c60dc 100644
--- a/openssl/build.rs
+++ b/openssl/build.rs
@@ -16,7 +16,7 @@ fn main() {
         _ => panic!("Unable to detect OpenSSL version"),
     }
 
-    if let Ok(vars) = env::var("DEP_OPENSSL_OSSLCONF") {
+    if let Ok(vars) = env::var("DEP_OPENSSL_CONF") {
         for var in vars.split(",") {
             println!("cargo:rustc-cfg=osslconf=\"{}\"", var);
         }