diff --git a/Aliases/libmpdec b/Aliases/libmpdec
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index 00000000000..2437d2f95be
--- /dev/null
+++ b/Aliases/libmpdec
@@ -0,0 +1 @@
+../Formula/mpdecimal.rb
\ No newline at end of file
diff --git a/Formula/mpdecimal.rb b/Formula/mpdecimal.rb
new file mode 100644
index 00000000000..076f75e6965
--- /dev/null
+++ b/Formula/mpdecimal.rb
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+class Mpdecimal < Formula
+  desc "Library for decimal floating point arithmetic"
+  homepage "https://www.bytereef.org/mpdecimal/"
+  url "https://www.bytereef.org/software/mpdecimal/releases/mpdecimal-2.5.0.tar.gz"
+  sha256 "15417edc8e12a57d1d9d75fa7e3f22b158a3b98f44db9d694cfd2acde8dfa0ca"
+  license "BSD-2-Clause"
+
+  def install
+    system "./configure", "--prefix=#{prefix}"
+    system "make"
+    system "make", "install"
+  end
+
+  test do
+    (testpath/"test.c").write <<~EOS
+      #include <assert.h>
+      #include <mpdecimal.h>
+      #include <string.h>
+
+      int main() {
+        mpd_context_t ctx;
+        mpd_t *a, *b, *result;
+        char *rstring;
+
+        mpd_defaultcontext(&ctx);
+
+        a = mpd_new(&ctx);
+        b = mpd_new(&ctx);
+        result = mpd_new(&ctx);
+
+        mpd_set_string(a, "0.1", &ctx);
+        mpd_set_string(b, "0.2", &ctx);
+        mpd_add(result, a, b, &ctx);
+        rstring = mpd_to_sci(result, 1);
+
+        assert(strcmp(rstring, "0.3") == 0);
+
+        mpd_del(a);
+        mpd_del(b);
+        mpd_del(result);
+        mpd_free(rstring);
+
+        return 0;
+      }
+    EOS
+    system ENV.cc, "test.c", "-o", "test", "-L#{lib}", "-lmpdec"
+    system "./test"
+  end
+end