diff --git a/Makefile b/Makefile
index b6fb2f9..395a7fc 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 PREFIX?=/usr/local
 INC=-I$(PREFIX)/include
-LIB=-L$(PREFIX)/lib -lpidutil
+LIB=-L$(PREFIX)/lib -lpidutil -lpthread
 CFLAGS=-Wall -Wextra -g -O2 -pipe -funroll-loops -ffast-math -fno-strict-aliasing
 CC?=cc