diff --git a/src/libutil/local.mk b/src/libutil/local.mk
index 4dae33054..2e5d2672e 100644
--- a/src/libutil/local.mk
+++ b/src/libutil/local.mk
@@ -6,6 +6,6 @@ libutil_DIR := $(d)
 
 libutil_SOURCES := $(wildcard $(d)/*.cc)
 
-libutil_LDFLAGS = -llzma $(OPENSSL_LIBS)
+libutil_LDFLAGS = -llzma -pthread $(OPENSSL_LIBS)
 
 libutil_LIBS = libformat