diff --git a/CMakeLists.txt b/CMakeLists.txt
index d3478cb..3b30889 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -26,15 +26,15 @@ set(INDEX_CC_FILES "${INDEX_CC_FILES}" "src/ranges/range_base.cc")
 set(MA_CC_FILES "${MA_CC_FILES}" "${INDEX_CC_FILES}" "src/operation_utils.cc")
 
 add_executable(iutest src/ranges/tests/index_unit_test.cc ${INDEX_CC_FILES})
-target_link_libraries(iutest ${GTEST_BOTH_LIBRARIES})
+target_link_libraries(iutest ${GTEST_BOTH_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
 add_test(NAME iutest COMMAND iutest)
 
 add_executable(mautest src/tests/ma_unit_test.cc ${MA_CC_FILES})
-target_link_libraries(mautest ${GTEST_BOTH_LIBRARIES})
+target_link_libraries(mautest ${GTEST_BOTH_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
 add_test(NAME mautest COMMAND mautest)
 
 add_executable(oputest src/tests/op_unit_test.cc ${MA_CC_FILES})
-target_link_libraries(oputest ${GTEST_BOTH_LIBRARIES})
+target_link_libraries(oputest ${GTEST_BOTH_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
 add_test(NAME oputest COMMAND oputest)
 
 #install(TARGETS testm DESTINATION install)