diff --git a/pokerth_lib.pro b/pokerth_lib.pro
index 90641983..86034996 100644
--- a/pokerth_lib.pro
+++ b/pokerth_lib.pro
@@ -156,7 +156,6 @@ SOURCES += \
 		src/engine/local_engine/localberoturn.cpp \
 		src/engine/local_engine/localberoriver.cpp \
 		src/engine/local_engine/localberopostriver.cpp \
-		src/engine/local_engine/tools.cpp \
 		src/engine/local_engine/localbero.cpp \
 		src/engine/local_engine/localexception.cpp \
 		src/engine/local_engine/arraydata.cpp \
@@ -205,6 +204,13 @@ SOURCES += \
 		src/net/common/sendbuffer.cpp \
 		src/net/common/receivebuffer.cpp
 
+!android{
+	SOURCES += src/engine/local_engine/tools.cpp
+}
+android{
+	SOURCES += src/engine/local_engine/tools_android.cpp
+}
+
 official_server{
 	INCLUDEPATH += pkth_stat/daemon_lib/src
 	DEFINES += POKERTH_OFFICIAL_SERVER
@@ -225,12 +231,12 @@ win32{
 }
 
 mac{
-        # make it x86_64 only
-        CONFIG += x86_64
-        CONFIG -= x86
-        CONFIG -= ppc
-        QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.6
-        QMAKE_CXXFLAGS -= -std=gnu++0x
+	# make it x86_64 only
+	CONFIG += x86_64
+	CONFIG -= x86
+	CONFIG -= ppc
+	QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.6
+	QMAKE_CXXFLAGS -= -std=gnu++0x
 
 	# for universal-compilation on PPC-Mac uncomment the following line
 	# on Intel-Mac you have to comment this line out or build will fail.
diff --git a/src/engine/local_engine/tools.cpp b/src/engine/local_engine/tools.cpp
index 9a2653d7..22a5c58a 100755
--- a/src/engine/local_engine/tools.cpp
+++ b/src/engine/local_engine/tools.cpp
@@ -18,6 +18,10 @@
 
 #define NOMINMAX // for Windows
 
+#ifdef ANDROID
+#error This file is not for android.
+#endif
+
 #include "tools.h"
 #include <core/loghelper.h>
 #include <core/openssl_wrapper.h>
@@ -26,8 +30,6 @@
 #include <boost/nondet_random.hpp>
 #include <boost/random/uniform_int.hpp>
 #include <boost/random/variate_generator.hpp>
-#include <set>
-#include <limits>
 
 
 using namespace std;
@@ -68,27 +70,3 @@ void Tools::GetRand(int minValue, int maxValue, unsigned count, int *out)
 	}
 }
 
-void Tools::GetRandUnique(int minValue, int maxValue, unsigned count, int *out)
-{
-	InitRandState();
-	unsigned numCreated = 0;
-	int *startPtr = out;
-	set<int> tmpSet;
-	for (unsigned i = 0; i < count; i++) {
-		boost::uniform_int<> dist(minValue, maxValue - numCreated);
-		boost::variate_generator<boost::random_device&, boost::uniform_int<> > gen(*g_rand_state, dist);
-		*startPtr = gen();
-		set<int>::const_iterator v = tmpSet.begin();
-		set<int>::const_iterator end = tmpSet.end();
-		while (v != end) {
-			if (*v <= *startPtr) {
-				(*startPtr)++;
-			}
-			++v;
-		}
-		tmpSet.insert(*startPtr);
-		startPtr++;
-		numCreated++;
-	}
-}
-
diff --git a/src/engine/local_engine/tools.h b/src/engine/local_engine/tools.h
index 0e26aeec..25d5a4ac 100755
--- a/src/engine/local_engine/tools.h
+++ b/src/engine/local_engine/tools.h
@@ -25,9 +25,6 @@ public:
 
 	static void ShuffleArrayNonDeterministic(int *inout, unsigned count);
 	static void GetRand(int minValue, int maxValue, unsigned count, int *out);
-	static void GetRandUnique(int minValue, int maxValue, unsigned count, int *out);
-
-	//static void getRandNumber(int, int, int, int*, bool, int* = 0, int = 0);
 
 };
 
diff --git a/src/engine/local_engine/tools_android.cpp b/src/engine/local_engine/tools_android.cpp
new file mode 100644
index 00000000..03df92a6
--- /dev/null
+++ b/src/engine/local_engine/tools_android.cpp
@@ -0,0 +1,72 @@
+/*****************************************************************************
+ * PokerTH - The open source texas holdem engine                             *
+ * Copyright (C) 2006-2011 Felix Hammer, Florian Thauer, Lothar May          *
+ *                                                                           *
+ * This program is free software: you can redistribute it and/or modify      *
+ * it under the terms of the GNU Affero General Public License as            *
+ * published by the Free Software Foundation, either version 3 of the        *
+ * License, or (at your option) any later version.                           *
+ *                                                                           *
+ * This program is distributed in the hope that it will be useful,           *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
+ * GNU Affero General Public License for more details.                       *
+ *                                                                           *
+ * You should have received a copy of the GNU Affero General Public License  *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.     *
+ *****************************************************************************/
+
+#define NOMINMAX // for Windows
+
+#ifndef ANDROID
+#error This file is only for android.
+#endif
+
+#include "tools.h"
+#include <core/loghelper.h>
+#include <core/openssl_wrapper.h>
+
+#include <boost/thread.hpp>
+#include <boost/random/mersenne_twister.hpp>
+#include <boost/random/uniform_int.hpp>
+#include <boost/random/variate_generator.hpp>
+
+using namespace std;
+
+boost::thread_specific_ptr<boost::mt19937> g_rand_state;
+
+struct det_rng : std::unary_function<unsigned, unsigned> {
+	boost::mt19937 &_state;
+	unsigned operator()(unsigned i) {
+		boost::uniform_int<> rng(0, i - 1);
+		return rng(_state);
+	}
+	det_rng(boost::mt19937 &state) : _state(state) {}
+};
+
+static inline void InitRandState()
+{
+	if (!g_rand_state.get()) {
+		g_rand_state.reset(new boost::mt19937(static_cast<unsigned>(std::time(0))));
+	}
+}
+
+void Tools::ShuffleArrayNonDeterministic(int *inout, unsigned count)
+{
+	// On android, a deterministic rng is used (for now).
+	InitRandState();
+	det_rng rand(*g_rand_state);
+	random_shuffle(&inout[0], &inout[count], rand);
+}
+
+void Tools::GetRand(int minValue, int maxValue, unsigned count, int *out)
+{
+	InitRandState();
+	boost::uniform_int<> dist(minValue, maxValue);
+	boost::variate_generator<boost::mt19937&, boost::uniform_int<> > gen(*g_rand_state, dist);
+	int *startPtr = out;
+	for (unsigned i = 0; i < count; i++) {
+		*startPtr++ = gen();
+	}
+}
+