diff --git a/pkgs/servers/nosql/mongodb/default.nix b/pkgs/servers/nosql/mongodb/default.nix
index 257d3c63e52c..a465d1c4a592 100644
--- a/pkgs/servers/nosql/mongodb/default.nix
+++ b/pkgs/servers/nosql/mongodb/default.nix
@@ -17,14 +17,14 @@ let version = "3.0.3";
     ] ++ optionals stdenv.isLinux [ "tcmalloc" ];
     buildInputs = [
       sasl boost gperftools pcre snappy
-      zlib libyamlcpp sasl openssl libpcap wiredtiger
-    ];
+      zlib libyamlcpp sasl openssl libpcap
+    ] ++ optional stdenv.is64bit wiredtiger;
 
     other-args = concatStringsSep " " ([
       "--c++11=on"
       "--ssl"
       #"--rocksdb" # Don't have this packaged yet
-      "--wiredtiger=on"
+      "--wiredtiger=${if stdenv.is64bit then "on" else "off"}"
       "--js-engine=v8-3.25"
       "--use-sasl-client"
       "--variant-dir=nixos" # Needed so we don't produce argument lists that are too long for gcc / ld