diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3a9650f..791cab0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,11 +3,22 @@ include_directories(.)
 add_definitions("-std=c++1y")
 
 add_executable(peglint lint/peglint.cc)
+target_link_libraries(peglint pthread)
+
 add_executable(playground lint/playground/main.cc)
+target_link_libraries(playground pthread)
+
 add_executable(test-main test/test.cc)
+target_link_libraries(test-main pthread)
 
 add_executable(calc example/calc.cc)
+target_link_libraries(calc pthread)
+
 add_executable(calc2 example/calc2.cc)
+target_link_libraries(calc2 pthread)
+
 add_executable(calc3 example/calc3.cc)
+target_link_libraries(calc3 pthread)
 
 add_executable(culebra language/main.cc language/repl.cc language/interpreter.cc language/parser.cc)
+target_link_libraries(culebra pthread)