diff --git a/pkgs/development/compilers/mlton/20210107-binary.nix b/pkgs/development/compilers/mlton/20210117-binary.nix
similarity index 98%
rename from pkgs/development/compilers/mlton/20210107-binary.nix
rename to pkgs/development/compilers/mlton/20210117-binary.nix
index 26a20db0d391..d4e55d47b94c 100644
--- a/pkgs/development/compilers/mlton/20210107-binary.nix
+++ b/pkgs/development/compilers/mlton/20210117-binary.nix
@@ -4,7 +4,7 @@ let
 in
 stdenv.mkDerivation rec {
   pname = "mlton";
-  version = "20210107";
+  version = "20210117";
 
   src =
     if stdenv.hostPlatform.system == "x86_64-linux" then
diff --git a/pkgs/development/compilers/mlton/default.nix b/pkgs/development/compilers/mlton/default.nix
index 1caeecccaadb..d2704a4093d0 100644
--- a/pkgs/development/compilers/mlton/default.nix
+++ b/pkgs/development/compilers/mlton/default.nix
@@ -12,11 +12,11 @@ rec {
     sha256 = "00rdd2di5x1dzac64il9z05m3fdzicjd3226wwjyynv631jj3q2a";
   };
 
-  mlton20210107Binary = callPackage ./20210107-binary.nix { };
+  mlton20210117Binary = callPackage ./20210117-binary.nix { };
 
-  mlton20210107 = callPackage ./from-git-source.nix {
+  mlton20210117 = callPackage ./from-git-source.nix {
     mltonBootstrap = mlton20180207Binary;
-    version = "20210107";
+    version = "20210117";
     rev = "on-20210117-release";
     sha256 = "sha256-rqL8lnzVVR+5Hc7sWXK8dCXN92dU76qSoii3/4StODM=";
   };
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 879d822f931a..3ec817adb129 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -776,6 +776,7 @@ mapAliases ({
   minetestserver_5 = minetestserver; # Added 2023-12-11
   minizip2 = pkgs.minizip-ng; # Added 2022-12-28
   mirage-im = throw "'mirage-im' has been removed, as it was broken and unmaintained"; # Added 2023-11-26
+  mlton20210107 = throw "'mlton20210107' has been renamed to 'mlton20210117', correcting the version number"; # Added 2024-03-31
   mod_dnssd = apacheHttpdPackages.mod_dnssd; # Added 2014-11-07
   mod_fastcgi = apacheHttpdPackages.mod_fastcgi; # Added 2014-11-07
   mod_python = apacheHttpdPackages.mod_python; # Added 2014-11-07
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 1f4846b4a3b3..d1b0db7413b6 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -16581,10 +16581,10 @@ with pkgs;
     mlton20130715
     mlton20180207Binary
     mlton20180207
-    mlton20210107
+    mlton20210117
     mltonHEAD;
 
-  mlton = mlton20210107;
+  mlton = mlton20210117;
 
   mono = mono6;