diff --git a/makefile b/makefile
index ee3f0a5..8512a70 100644
--- a/makefile
+++ b/makefile
@@ -25,7 +25,7 @@ all:set_flags $(objectdir)
 
 debug:set_debug_flags $(objectdir)
 
-$(objectdir):$(builddir)/random.o $(builddir)/sa.o src/main.cpp
+$(objectdir):$(builddir) $(builddir)/random.o $(builddir)/sa.o src/main.cpp
 	$(CXX) $(CPPFLAGS) $(builddir)/random.o $(builddir)/sa.o src/main.cpp -o $(objectdir)
 
 $(builddir)/random.o:src/random.cpp
@@ -34,6 +34,9 @@ $(builddir)/random.o:src/random.cpp
 $(builddir)/sa.o:src/sa.cpp
 	$(CXX) $(CPPFLAGS) src/sa.cpp -o $(builddir)/sa.o -c
 
+$(builddir):
+	mkdir -p $(builddir)
+
 set_flags:
 	$(eval override CPPFLAGS += $(warnings) $(optimize_flags) $(standart))