diff --git a/lab_2/12/Makefile b/lab_2/12/Makefile
new file mode 100644
index 0000000..0ef13b8
--- /dev/null
+++ b/lab_2/12/Makefile
@@ -0,0 +1,18 @@
+binary = memleak
+folder = memleak
+objects = $(patsubst %.cpp,%.o,$(wildcard *.cpp))
+
+run: $(binary)
+	./$(binary) 7 100000000
+
+$(binary): $(objects)
+	g++ -o $@ $^
+
+clean:
+	rm -f *.o
+
+clear: clean
+	rm -f *.zip $(binary)
+
+zip: clean
+	zip $(folder) Makefile *.cpp *.h
diff --git a/lab_2/12/chain-random-walk.o b/lab_2/12/chain-random-walk.o
new file mode 100644
index 0000000..5c67061
Binary files /dev/null and b/lab_2/12/chain-random-walk.o differ
diff --git a/lab_2/12/memleak.cpp b/lab_2/12/memleak.cpp
index 89b57b9..5833225 100644
--- a/lab_2/12/memleak.cpp
+++ b/lab_2/12/memleak.cpp
@@ -45,7 +45,11 @@ int main(int argc, char** argv)
       /* here we are calling the random walk step;
        * this returns a new configuration (float array) on the heap
        */
+
+      // Simple fix to memleak:
+      float* old_configuration = present_configuration;
       present_configuration = crw::step(size, present_configuration);
+      delete old_configuration;
       float present_elongation = crw::elongation(size, present_configuration);
 
       if(present_elongation > extreme_elongation)