diff --git a/pkgs/development/libraries/openssl/default.nix b/pkgs/development/libraries/openssl/default.nix
index 0251de77d03e..47467ce4edec 100644
--- a/pkgs/development/libraries/openssl/default.nix
+++ b/pkgs/development/libraries/openssl/default.nix
@@ -45,7 +45,9 @@ let
         if hostPlatform == buildPlatform
           then "./config"
         else if hostPlatform.isMinGW
-          then "./Configure mingw${toString hostPlatform.parsed.cpu.bits}"
+          then "./Configure mingw${optionalString
+                                     (hostPlatform.parsed.cpu.bits != 32)
+                                     (toString hostPlatform.parsed.cpu.bits)}"
         else if hostPlatform.isLinux
           then "./Configure linux-generic${toString hostPlatform.parsed.cpu.bits}"
         else if hostPlatform.isiOS