diff --git a/ipt2socks/Makefile b/ipt2socks/Makefile
index f5a51fe7f..ebc9158b2 100644
--- a/ipt2socks/Makefile
+++ b/ipt2socks/Makefile
@@ -31,7 +31,7 @@ define Package/ipt2socks/description
   Utility for converting iptables (redirect/tproxy) to socks5.
 endef
 
-TARGET_CFLAGS+= $(FPIC) -flto
+TARGET_CFLAGS+= $(FPIC) -flto -pthread
 MAKE_FLAGS+= \
 	CFLAGS="-std=c99 $(TARGET_CFLAGS)" \
 	EVCFLAGS="$(TARGET_CFLAGS)"