diff --git a/CMakeLists.txt b/CMakeLists.txt
index 63a004e36..4857f5428 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -559,6 +559,12 @@ CHECK_FUNCTION_EXISTS(getgrnam_r LWS_HAVE_GETGRNAM_R)
 CHECK_FUNCTION_EXISTS(getpwuid_r LWS_HAVE_GETPWUID_R)
 CHECK_FUNCTION_EXISTS(getpwnam_r LWS_HAVE_GETPWNAM_R)
 
+if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
+	if(CMAKE_OSX_DEPLOYMENT_TARGET LESS "10.12")
+		message("No clock_gettime found on macOS ${CMAKE_OSX_DEPLOYMENT_TARGET}. Disabling LWS_HAVE_CLOCK_GETTIME.")
+		set(LWS_HAVE_CLOCK_GETTIME 0)
+	endif()
+endif()
 
 if (NOT LWS_HAVE_GETIFADDRS)
 	if (LWS_WITHOUT_BUILTIN_GETIFADDRS)