diff --git a/base/runtime/internal.odin b/base/runtime/internal.odin
index bff5b8380..38b7f662c 100644
--- a/base/runtime/internal.odin
+++ b/base/runtime/internal.odin
@@ -1109,6 +1109,7 @@ __read_bits :: proc "contextless" (dst, src: [^]byte, offset: uintptr, size: uin
 
 when .Address in ODIN_SANITIZER_FLAGS {
 	foreign {
+		@(require)
 		__asan_unpoison_memory_region :: proc "system" (address: rawptr, size: uint) ---
 	}
 }