diff --git a/Makefile b/Makefile
index 71044dc..be0d986 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 CC = gcc
 CFLAGS = -Wall -g -c -std=gnu11
-LDFLAGS = -lrt
+LDFLAGS = -pthread
 BUILD_DIR = build
 BINARY_NAME = mailbox
 OBJ_FILES = $(patsubst %.c,$(BUILD_DIR)/%.o,$(wildcard *.c))