diff --git a/Makefile b/Makefile
index b22d77e..2bfd76d 100644
--- a/Makefile
+++ b/Makefile
@@ -41,7 +41,7 @@ ifeq ($(UNAME),Darwin) # Mac OS X/MacPorts stuff
 else
   ifeq ($(UNAME),OpenBSD) # OpenBSD Ports stuff
 	PORTS_CFLAGS = `pkg-config --cflags libusb`
-	PORTS_LDFLAGS = `pkg-config --libs libusb` -ltermcap
+	PORTS_LDFLAGS = `pkg-config --libs libusb` -ltermcap -pthread
   else
 	PORTS_CFLAGS =
 	PORTS_LDFLAGS =