diff --git a/Formula/cmark.rb b/Formula/cmark.rb
index 45920c53cd..018b384e78 100644
--- a/Formula/cmark.rb
+++ b/Formula/cmark.rb
@@ -17,7 +17,7 @@ class Cmark < Formula
 
   def install
     mkdir "build" do
-      system "cmake", "..", *std_cmake_args
+      system "cmake", "..", "-DCMAKE_INSTALL_LIBDIR=lib", *std_cmake_args
       system "make"
       system "make", "test"
       system "make", "install"