diff --git a/Makefile b/Makefile
index 8310ad5..9713e26 100644
--- a/Makefile
+++ b/Makefile
@@ -3,8 +3,8 @@
 CFLAGS+=-g -O2 -Wall -Wno-switch -Wextra -fstack-protector-strong -D_FORTIFY_SOURCE=2
 LDLIBS=-lrt
 ifdef OPENBSD
-CFLAGS+=-I/usr/local/include
-LDLIBS=-L/usr/local/lib -liconv
+CFLAGS+=-I/usr/local/include -pthread
+LDLIBS=-L/usr/local/lib -liconv -pthread
 endif
 
 DESTDIR=