diff --git a/pkgs/development/libraries/openssl/default.nix b/pkgs/development/libraries/openssl/default.nix
index 5a9052222cb8..370616745d33 100644
--- a/pkgs/development/libraries/openssl/default.nix
+++ b/pkgs/development/libraries/openssl/default.nix
@@ -71,8 +71,7 @@ let
 
     makeFlags = [ "MANDIR=$(man)/share/man" ];
 
-    # Parallel building is broken in OpenSSL.
-    enableParallelBuilding = false;
+    enableParallelBuilding = true;
 
     postInstall = ''
       # If we're building dynamic libraries, then don't install static