diff --git a/readme.md b/readme.md
index 9eafa28..a8e16a9 100644
--- a/readme.md
+++ b/readme.md
@@ -330,6 +330,7 @@ Content-Type: application/json
 `erlang`,
 `file`,
 `forte`,
+`forth`,
 `fortran`,
 `freebasic`,
 `fsharp.net`,
diff --git a/runtimes/default.nix b/runtimes/default.nix
index e8eb533..61fa994 100644
--- a/runtimes/default.nix
+++ b/runtimes/default.nix
@@ -64,4 +64,5 @@ args: {
     "llvm_ir" = import ./llvm_ir.nix args;
     "mono-basic" = import ./mono-basic.nix args;
     "j" = import ./j.nix args;
+    "forth" = import ./forth.nix args;
 }
diff --git a/runtimes/forth.nix b/runtimes/forth.nix
new file mode 100644
index 0000000..b9edfa9
--- /dev/null
+++ b/runtimes/forth.nix
@@ -0,0 +1,30 @@
+{pkgs, piston, ...}:
+let
+    pkg = pkgs.gforth;
+in piston.mkRuntime {
+    language = "forth";
+    version = pkg.version;
+    runtime = "forth";
+
+    aliases = [
+        "gforth"
+    ];
+
+    run = ''
+    ${pkg}/bin/gforth "$@"
+    '';
+
+    tests = [
+        (piston.mkTest {
+            files = {
+                "test.forth" = ''
+                .( OK) bye
+                '';
+            };
+            args = [];
+            stdin = "";
+            packages = [];
+            main = "test.forth";
+        })
+    ];
+}