diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3cc384cc..e4157464 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -100,6 +100,9 @@ if(CMAKE_COMPILER_IS_GNUCC)
 endif()
 
 if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
+  if (UNIX AND NOT APPLE)
+    set(CMAKE_CXX_FLAGS "-pthread ${CMAKE_CXX_FLAGS}")  #force pthread to avoid bugs in some cmake setups
+  endif()
   set(CMAKE_CXX_FLAGS "-Wno-deprecated -Wno-writable-strings ${CMAKE_CXX_FLAGS}")
   string(REGEX REPLACE "-O0" "-Og" CMAKE_CXX_FLAGS_DEBUG ${CMAKE_CXX_FLAGS_DEBUG})
   string(REGEX REPLACE "-O3" "-Ofast" CMAKE_CXX_FLAGS_RELEASE ${CMAKE_CXX_FLAGS_RELEASE})