diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9c6b510..cb7b15a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,5 +42,6 @@ target_link_libraries(breakhack
 enable_testing()
 
 add_executable(test_util test/check_util src/util)
+target_compile_options(test_util PRIVATE -pthread)
 target_link_libraries(test_util -lcheck)
 add_test(test_util test_util)
diff --git a/linkedlist/CMakeLists.txt b/linkedlist/CMakeLists.txt
index f807c37..5302920 100644
--- a/linkedlist/CMakeLists.txt
+++ b/linkedlist/CMakeLists.txt
@@ -10,5 +10,6 @@ add_library(linkedlist linkedlist.c)
 
 enable_testing()
 add_executable(test_list check_linkedlist linkedlist)
+target_compile_options(test_list PRIVATE -pthread)
 target_link_libraries(test_list -lcheck)
 add_test(test_list test_list)