diff --git a/Makefile b/Makefile
index e85e13c..eebd50c 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ OBJ_UTIL = hex.o bloom.o mmapf.o hsearchf.o ec_pubkey_fast.o ripemd160_256.o dld
 OBJ_ALGO = $(patsubst %.c,%.o,$(wildcard algo/*.c))
 OBJECTS = $(OBJ_MAIN) $(OBJ_UTIL) $(OBJ_ALGO)
 BINARIES = brainflayer hexln hex2blf blfchk ecmtabgen filehex
-LIBS = -lssl -lrt -lcrypto -lz -lgmp
+LIBS = -lssl -lrt -lcrypto -lz -lgmp -lpthread
 CFLAGS = -O3 \
          -flto -funsigned-char -falign-functions=16 -falign-loops=16 -falign-jumps=16 \
          -Wall -Wextra -Wno-pointer-sign -Wno-sign-compare \