diff --git a/src/libutil/local.mk b/src/libutil/local.mk
index 4dae3305433f4bd30be7b0a3cb1632d059497b0c..2e5d2672e5f08eb6f1155dee02c0a3a5b8e47312 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