diff --git a/CMakeLists.txt b/CMakeLists.txt
index bd050a5..625a434 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -135,6 +135,7 @@ add_definitions(/DZMQ_STATIC)
 
 include(CheckSymbolExists)
 
+set(CMAKE_REQUIRED_FLAGS "${GENERAL_FLAGS}")
 check_symbol_exists(pthread_cancel pthread.h HAVE_PTHREAD_CANCEL)
 
 if (HAVE_PTHREAD_CANCEL)
diff --git a/cmake/flags.cmake b/cmake/flags.cmake
index 55c7d06..76d93ee 100644
--- a/cmake/flags.cmake
+++ b/cmake/flags.cmake
@@ -6,14 +6,15 @@ set(CMAKE_C_STANDARD 99)
 set(CMAKE_C_STANDARD_REQUIRED ON)
 
 if (CMAKE_CXX_COMPILER_ID MATCHES GNU)
+	set(GENERAL_FLAGS "-pthread")
 	set(WARNING_FLAGS "-Wall -Wextra -Werror")
 	set(OPTIMIZATION_FLAGS "-Ofast -s")
 
-	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
-	set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${GENERAL_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
+	set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${GENERAL_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
 
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
-	set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GENERAL_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
+	set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${GENERAL_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
 
 	if (WIN32)
 		set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static")
@@ -25,26 +26,28 @@ if (CMAKE_CXX_COMPILER_ID MATCHES GNU)
 		endif()
 	endif()
 elseif (CMAKE_CXX_COMPILER_ID MATCHES MSVC)
+	set(GENERAL_FLAGS "")
 	set(WARNING_FLAGS "/Wall /WX /sdl")
 	set(SECURITY_FLAGS "/GS /guard:cf")
 	set(OPTIMIZATION_FLAGS "/O2 /Oi /Ob2 /Ot /DNDEBUG /GL")
 
-	set(CMAKE_C_FLAGS_DEBUG "${WARNING_FLAGS} ${SECURITY_FLAGS} /Od /Ob0 /Zi /MTd /fsanitize=address")
-	set(CMAKE_CXX_FLAGS_DEBUG "${WARNING_FLAGS} ${SECURITY_FLAGS} /Od /Ob0 /Zi /MTd /fsanitize=address")
+	set(CMAKE_C_FLAGS_DEBUG "${GENERAL_FLAGS} ${WARNING_FLAGS} ${SECURITY_FLAGS} /Od /Ob0 /Zi /MTd /fsanitize=address")
+	set(CMAKE_CXX_FLAGS_DEBUG "${GENERAL_FLAGS} ${WARNING_FLAGS} ${SECURITY_FLAGS} /Od /Ob0 /Zi /MTd /fsanitize=address")
 
-	set(CMAKE_C_FLAGS_RELEASE "${WARNING_FLAGS} ${SECURITY_FLAGS} ${OPTIMIZATION_FLAGS} /MT")
-	set(CMAKE_CXX_FLAGS_RELEASE "${WARNING_FLAGS} ${SECURITY_FLAGS} ${OPTIMIZATION_FLAGS} /MT")
+	set(CMAKE_C_FLAGS_RELEASE "${GENERAL_FLAGS} ${WARNING_FLAGS} ${SECURITY_FLAGS} ${OPTIMIZATION_FLAGS} /MT")
+	set(CMAKE_CXX_FLAGS_RELEASE "${GENERAL_FLAGS} ${WARNING_FLAGS} ${SECURITY_FLAGS} ${OPTIMIZATION_FLAGS} /MT")
 
-	set(CMAKE_C_FLAGS_RELWITHDEBINFO "${WARNING_FLAGS} ${SECURITY_FLAGS} /Ob1 /Ot /Zi /MT")
-	set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${WARNING_FLAGS} ${SECURITY_FLAGS} /Ob1 /Ot /Zi /MT")
+	set(CMAKE_C_FLAGS_RELWITHDEBINFO "${GENERAL_FLAGS} ${WARNING_FLAGS} ${SECURITY_FLAGS} /Ob1 /Ot /Zi /MT")
+	set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${GENERAL_FLAGS} ${WARNING_FLAGS} ${SECURITY_FLAGS} /Ob1 /Ot /Zi /MT")
 
 elseif (CMAKE_CXX_COMPILER_ID MATCHES Clang)
+	set(GENERAL_FLAGS "-pthread")
 	set(WARNING_FLAGS "-Wall -Wextra -Wno-undefined-internal -Werror")
 	set(OPTIMIZATION_FLAGS "-Ofast -funroll-loops -fmerge-all-constants")
 
-	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
-	set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${GENERAL_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
+	set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${GENERAL_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
 
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
-	set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GENERAL_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
+	set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${GENERAL_FLAGS} ${WARNING_FLAGS} ${OPTIMIZATION_FLAGS}")
 endif()