diff --git a/lib_fiber/c/src/stdafx.h b/lib_fiber/c/src/stdafx.h
index d21bba6d8e9da0150a311d45c8c0abc1499fb892..b560a74e773179938fba24e9b7842e3ecc910dba 100644
--- a/lib_fiber/c/src/stdafx.h
+++ b/lib_fiber/c/src/stdafx.h
@@ -73,7 +73,7 @@
 # include <sys/sendfile.h>
 # include <sys/epoll.h>
 
-# if !defined(__aarch64__)
+# if !defined(__aarch64__) && !defined(__arm__)
 #  define USE_FAST_TIME
 # endif