diff --git a/src/core/abstract.c b/src/core/abstract.c
index 20d43f34..e791536c 100644
--- a/src/core/abstract.c
+++ b/src/core/abstract.c
@@ -31,6 +31,8 @@
 #ifdef JANET_EV
 #ifdef JANET_WINDOWS
 #include <windows.h>
+#else
+#include <stdatomic.h>
 #endif
 #endif