diff --git a/gtests/net/packetdrill/Makefile.Darwin b/gtests/net/packetdrill/Makefile.Darwin
index dc89480bbca9f7e5e64fcb3a27af046f3546dd7e..908b2770bf0f6f5b7448129ba1ffc9307251b33e 100644
--- a/gtests/net/packetdrill/Makefile.Darwin
+++ b/gtests/net/packetdrill/Makefile.Darwin
@@ -1,4 +1,4 @@
-packetdrill-ext-libs := -pthread -lpcap
+packetdrill-ext-libs := -lpcap
 CFLAGS = -D__APPLE_USE_RFC_3542
 LDFLAGS =
 ifneq ("$(wildcard /usr/lib/libsctp.dylib)","")