diff --git a/cmake/simdjson-flags.cmake b/cmake/simdjson-flags.cmake
index 076b5a19..1c7d33e5 100644
--- a/cmake/simdjson-flags.cmake
+++ b/cmake/simdjson-flags.cmake
@@ -133,17 +133,6 @@ if(SIMDJSON_ENABLE_THREADS)
   target_compile_definitions(simdjson-flags INTERFACE SIMDJSON_THREADS_ENABLED=1) # This will be set in the code automatically.
 endif()
 
-# Some users compile simdjson with thread support but still do not want simdjson to use threads.
-#
-#  Important : Expect this option to disappear in the future.
-#
-option(SIMDJSON_DO_NOT_USE_THREADS_NO_MATTER_WHAT "Whether we enabled thread support or not (SIMDJSON_ENABLE_THREADS), do not use threads.\
- This option does nothing when thread support is not enabled. We reserve the right to remove this option in a future release in\
- favor of a runtime approach." OFF)
-if(SIMDJSON_DO_NOT_USE_THREADS_NO_MATTER_WHAT)
-  target_compile_definitions(simdjson-flags INTERFACE SIMDJSON_DO_NOT_USE_THREADS_NO_MATTER_WHAT=1)
-endif()
-
 if(SIMDJSON_USE_LIBCPP)
   target_link_libraries(simdjson-flags INTERFACE -stdlib=libc++ -lc++abi)
   # instead of the above line, we could have used
diff --git a/include/simdjson/portability.h b/include/simdjson/portability.h
index 8f9f1842..26b7069b 100644
--- a/include/simdjson/portability.h
+++ b/include/simdjson/portability.h
@@ -148,12 +148,6 @@ use a 64-bit target such as x64 or 64-bit ARM.")
 #endif
 
 
-#if SIMDJSON_DO_NOT_USE_THREADS_NO_MATTER_WHAT
-// No matter what happened, we undefine SIMDJSON_THREADS_ENABLED and so disable threads.
-#undef SIMDJSON_THREADS_ENABLED
-#endif
-
-
 #if defined(__clang__)
 #define NO_SANITIZE_UNDEFINED __attribute__((no_sanitize("undefined")))
 #elif defined(__GNUC__)