diff --git a/pkgs/development/compilers/zig/default.nix b/pkgs/development/compilers/zig/default.nix
index 512cfa80d424..079b539948da 100644
--- a/pkgs/development/compilers/zig/default.nix
+++ b/pkgs/development/compilers/zig/default.nix
@@ -4,6 +4,7 @@
   llvmPackages_18,
   llvmPackages_19,
   llvmPackages_20,
+  llvmPackages_21,
   zigVersions ? { },
 }:
 let
@@ -20,6 +21,10 @@ let
       llvmPackages = llvmPackages_20;
       hash = "sha256-u3pEMcYN71d83MJh14vtzU4DJXnMHu/Jw86d9XvwKE8=";
     };
+    "0.16.0" = {
+      llvmPackages = llvmPackages_21;
+      hash = "sha256-2sTMhaasyrKoBnyH/hQrNCbi0Vh6HekIrpE4XkyQulQ=";
+    };
   }
   // zigVersions;
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 63734f9d9c27..570f20110bc9 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -7599,11 +7599,13 @@ with pkgs;
       zig_0_13 = zigPackages."0.13";
       zig_0_14 = zigPackages."0.14";
       zig_0_15 = zigPackages."0.15";
+      zig_0_16 = zigPackages."0.16";
     })
     zigPackages
     zig_0_13
     zig_0_14
     zig_0_15
+    zig_0_16
     ;
 
   # If this is updated, the default zls version should also be updated to match the default zig version.