diff --git a/bitcoin-qt.pro b/bitcoin-qt.pro
index 8aceb0390..68add9112 100644
--- a/bitcoin-qt.pro
+++ b/bitcoin-qt.pro
@@ -90,6 +90,29 @@ contains(BITCOIN_NEED_QT_PLUGINS, 1) {
     QTPLUGIN += qcncodecs qjpcodecs qtwcodecs qkrcodecs qtaccessiblewidgets
 }
 
+contains(USE_LEVELDB, -) {
+    message(Building without LevelDB)
+} else {
+    message(Building with LevelDB)
+    DEFINES += USE_LEVELDB
+    INCLUDEPATH += src/leveldb/include src/leveldb/helpers
+    LIBS += $$PWD/src/leveldb/libleveldb.a $$PWD/src/leveldb/libmemenv.a
+    !windows {
+        genleveldb.commands = cd $$PWD/src/leveldb ; $(MAKE) libleveldb.a libmemenv.a
+    } else {
+        # make an educated guess about what the ranlib command is called
+        isEmpty(QMAKE_RANLIB) {
+            QMAKE_RANLIB = $$replace(QMAKE_STRIP, strip, ranlib)
+        }
+        genleveldb.commands = cd $$PWD/src/leveldb ; CC=$$QMAKE_CC CXX=$$QMAKE_CXX TARGET_OS=OS_WINDOWS_CROSSCOMPILE CXXFLAGS="-I$$BOOST_INCLUDE_PATH" LDFLAGS="-L$$BOOST_LIB_PATH" $(MAKE) libleveldb.a libmemenv.a ; $$QMAKE_RANLIB $$PWD/src/leveldb/libleveldb.a ; $$QMAKE_RANLIB $$PWD/src/leveldb/libmemenv.a
+    }
+    genleveldb.target = $$PWD/src/leveldb/libleveldb.a
+    genleveldb.depends = FORCE
+    PRE_TARGETDEPS += $$PWD/src/leveldb/libleveldb.a
+    QMAKE_EXTRA_TARGETS += genleveldb
+    # Gross ugly hack that depends on qmake internals, unfortunately there's no other way to do it.
+    QMAKE_CLEAN += $$PWD/src/leveldb/libleveldb.a; cd $$PWD/src/leveldb ; $(MAKE) clean
+}
 
 # regenerate src/build.h
 !windows|contains(USE_BUILD_INFO, 1) {
diff --git a/src/makefile.linux-mingw b/src/makefile.linux-mingw
index 0970469a9..8f8279c92 100644
--- a/src/makefile.linux-mingw
+++ b/src/makefile.linux-mingw
@@ -6,6 +6,7 @@ DEPSDIR:=/usr/i586-mingw32msvc
 
 USE_UPNP:=0
 USE_IPV6:=1
+USE_LEVELDB:=1
 
 INCLUDEPATHS= \
  -I"$(CURDIR)" \
@@ -86,6 +87,15 @@ OBJS= \
 
 all: bitcoind.exe
 
+ifdef USE_LEVELDB
+LIBS += $(CURDIR)/leveldb/libleveldb.lib $(CURDIR)/leveldb/libmemenv.a
+DEFS += -I"$(CURDIR)/leveldb/include" -DUSE_LEVELDB
+DEFS += -I"$(CURDIR)/leveldb/helpers"
+leveldb/libleveldb.a:
+	@echo "Building LevelDB ..."; cd leveldb; TARGET_OS=OS_WINDOWS_CROSSCOMPILE CXXFLAGS="-I$(INCLUDEPATHS)" LDFLAGS="-L$(LIBPATHS)" make libleveldb.a libmemenv.a; cd ..
+obj/db.o: leveldb/libleveldb.a
+endif
+
 obj/build.h: FORCE
 	/bin/sh ../share/genbuild.sh obj/build.h
 version.cpp: obj/build.h
diff --git a/src/makefile.mingw b/src/makefile.mingw
index 54054c25f..e2560d991 100644
--- a/src/makefile.mingw
+++ b/src/makefile.mingw
@@ -4,6 +4,7 @@
 
 USE_UPNP:=0
 USE_IPV6:=1
+USE_LEVELDB:=1
 
 INCLUDEPATHS= \
  -I"C:\boost-1.50.0-mgw" \
@@ -86,6 +87,18 @@ all: bitcoind.exe
 test check: test_bitcoin.exe FORCE
 	test_bitcoin.exe
 
+#
+# LevelDB support
+#
+ifdef USE_LEVELDB
+LIBS += $(CURDIR)/leveldb/libleveldb.a $(CURDIR)/leveldb/libmemenv.a
+DEFS += $(addprefix -I,$(CURDIR)/leveldb/include) -DUSE_LEVELDB
+DEFS += $(addprefix -I,$(CURDIR)/leveldb/helpers)
+leveldb/libleveldb.a:
+    cd leveldb; make libleveldb.a libmemenv.a; cd ..
+obj/db.o: leveldb/libleveldb.lib
+endif
+
 obj/%.o: %.cpp $(HEADERS)
 	g++ -c $(CFLAGS) -o $@ $<
 
diff --git a/src/makefile.osx b/src/makefile.osx
index 359739bd5..bfda78841 100644
--- a/src/makefile.osx
+++ b/src/makefile.osx
@@ -21,6 +21,7 @@ LIBPATHS= \
 
 USE_UPNP:=1
 USE_IPV6:=1
+USE_LEVELDB:=1
 
 LIBS= -dead_strip
 
@@ -119,6 +120,18 @@ all: bitcoind
 test check: test_bitcoin FORCE
 	./test_bitcoin
 
+#
+# LevelDB support
+#
+ifdef USE_LEVELDB
+LIBS += $(CURDIR)/leveldb/libleveldb.a $(CURDIR)/leveldb/libmemenv.a
+DEFS += $(addprefix -I,$(CURDIR)/leveldb/include) -DUSE_LEVELDB
+DEFS += $(addprefix -I,$(CURDIR)/leveldb/helpers)
+leveldb/libleveldb.a:
+	@echo "Building LevelDB ..."; cd leveldb; make libleveldb.a libmemenv.a; cd ..
+obj/db.o: leveldb/libleveldb.a
+endif
+
 # auto-generated dependencies:
 -include obj/*.P
 -include obj-test/*.P
diff --git a/src/makefile.unix b/src/makefile.unix
index a41b57b4f..01b637e9c 100644
--- a/src/makefile.unix
+++ b/src/makefile.unix
@@ -4,6 +4,7 @@
 
 USE_UPNP:=0
 USE_IPV6:=1
+USE_LEVELDB:=1
 
 LINK:=$(CXX)
 
@@ -135,6 +136,18 @@ all: bitcoind
 test check: test_bitcoin FORCE
 	./test_bitcoin
 
+#
+# LevelDB support
+#
+ifdef USE_LEVELDB
+LIBS += $(CURDIR)/leveldb/libleveldb.a $(CURDIR)/leveldb/libmemenv.a
+DEFS += $(addprefix -I,$(CURDIR)/leveldb/include) -DUSE_LEVELDB
+DEFS += $(addprefix -I,$(CURDIR)/leveldb/helpers)
+leveldb/libleveldb.a:
+	@echo "Building LevelDB ..."; cd leveldb; make libleveldb.a libmemenv.a; cd ..;
+obj/db.o: leveldb/libleveldb.a
+endif
+
 # auto-generated dependencies:
 -include obj/*.P
 -include obj-test/*.P