1 files changed, 2 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index ccea193..69b46fb 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,6 @@
 CXX = g++
 CXXFLAGS = -Wall -Wextra -std=c++11 -O2 -fwrapv
+LDFLAGS = -pthread
 
 .PHONY: all clean remake
 
@@ -13,7 +14,7 @@ remake: clean
 
 
 roots: $(patsubst %.cpp,%.o,$(wildcard *.cpp))
-	$(CXX) -o $@ $^
+	$(CXX) -o $@ $^ $(LDFLAGS)
 
 %.o: %.cpp $(wildcard *.h)
 	$(CXX) $(CXXFLAGS) -c -o $@ $<