diff --git a/.gitignore b/.gitignore
index 8632252..b33bda3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,8 @@ lib
 *.swp
 *.swo
 tmux-*.log
+native-src/zxcvbn/*.o
+native-src/zxcvbn/*.so
+native-src/zxcvbn/_frequency_lists.?pp
+native-src/zxcvbn/adjacency_graphs.?pp
+
diff --git a/native-src/zxcvbn/Makefile b/native-src/zxcvbn/Makefile
new file mode 100644
index 0000000..279c802
--- /dev/null
+++ b/native-src/zxcvbn/Makefile
@@ -0,0 +1,70 @@
+CXX = g++
+CXXFLAGS = -c -std=c++14 -Wall -Wextra -fPIC
+CPPFLAGS = -I..
+
+ifeq ($(DEBUG),yes)
+    CXXFLAGS += -g -O0
+else
+    CXXFLAGS += -O2
+    CPPFLAGS += -DNDEBUG
+endif
+
+PREFIX = /usr/local
+LIBDIR = $(PREFIX)/lib
+INCLUDEDIR = $(PREFIX)/include
+
+LIBRARY = libzxcvbncpp.so
+
+SCRIPTS_DIR = ../../data-scripts
+DATA_DIR = ../../data
+
+OBJS = _frequency_lists.o \
+       adjacency_graphs.o \
+       feedback.o \
+       frequency_lists.o \
+       matching.o \
+       scoring.o \
+       time_estimates.o \
+       util.o \
+       zxcvbn.o
+
+HEADERS = _frequency_lists.hpp \
+	  adjacency_graphs.hpp \
+	  common.hpp \
+	  feedback.hpp \
+	  frequency_lists.hpp \
+	  frequency_lists_common.hpp \
+	  matching.hpp \
+	  optional.hpp \
+	  scoring.hpp \
+	  time_estimates.hpp \
+	  util.hpp \
+	  zxcvbn.h
+
+$(LIBRARY): $(OBJS)
+	$(CXX) -shared -Wl,-soname,$(LIBRARY) -o $(LIBRARY) $(OBJS)
+
+_frequency_lists.cpp:
+	$(SCRIPTS_DIR)/build_frequency_lists.py $(DATA_DIR) $@
+
+_frequency_lists.hpp:
+	$(SCRIPTS_DIR)/build_frequency_lists.py $(DATA_DIR) $@
+
+adjacency_graphs.cpp:
+	$(SCRIPTS_DIR)/build_keyboard_adjacency_graphs.py $@
+
+adjacency_graphs.hpp:
+	$(SCRIPTS_DIR)/build_keyboard_adjacency_graphs.py $@
+
+%.o: %.cpp $(HEADERS)
+	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -o $@ $<
+
+install: $(LIBRARY)
+	install -s -m 755 -D $(LIBRARY) $(DESTDIR)$(LIBDIR)/$(LIBRARY)
+	mkdir -p $(DESTDIR)$(INCLUDEDIR)/zxcvbn
+	install -m 644 $(HEADERS) $(DESTDIR)$(INCLUDEDIR)/zxcvbn
+
+clean:
+	rm -f $(OBJS)
+
+.PHONY: clean