diff --git a/openssl-sys/build/main.rs b/openssl-sys/build/main.rs
index c9bddf538..1a7f1913c 100644
--- a/openssl-sys/build/main.rs
+++ b/openssl-sys/build/main.rs
@@ -380,6 +380,8 @@ See rust-openssl documentation for more information:
             (3, 8, _) => ('3', '8', 'x'),
             (3, 9, 0) => ('3', '9', '0'),
             (3, 9, _) => ('3', '9', 'x'),
+            (4, 0, 0) => ('4', '0', '0'),
+            (4, 0, _) => ('4', '0', 'x'),
             _ => version_error(),
         };