diff --git a/quickjs.c b/quickjs.c
index a2c653e..afc4b34 100644
--- a/quickjs.c
+++ b/quickjs.c
@@ -67,12 +67,6 @@
 #define CONFIG_PRINTF_RNDN
 #endif
 
-/* define to include Atomics.* operations which depend on the OS
-   threads */
-#if !defined(EMSCRIPTEN)
-#define CONFIG_ATOMICS
-#endif
-
 #if !defined(EMSCRIPTEN)
 /* enable stack limitation */
 #define CONFIG_STACK_CHECK