diff --git a/Makefile b/Makefile
index 9e24b70..d464064 100644
--- a/Makefile
+++ b/Makefile
@@ -2,8 +2,8 @@
 
 CC      = gcc
 CXX     = g++
-CFLAGS  = -g -O3 -Wall -std=c++0x
-LIBS    =
+CFLAGS  = -g -O3 -Wall -std=c++0x -pthread
+LIBS    = -lpthread
 LDFLAGS = -g
 
 OBJECTS = \
diff --git a/Makefile.Pi.Adafruit b/Makefile.Pi.Adafruit
index e929fb6..7e5a9a5 100644
--- a/Makefile.Pi.Adafruit
+++ b/Makefile.Pi.Adafruit
@@ -2,7 +2,7 @@
 # Support for the Adafruit i2c 16 x 2 RGB LCD Pi Plate
 CC      = gcc
 CXX     = g++
-CFLAGS  = -g -O3 -Wall -std=c++0x -DHD44780 -DADAFRUIT_DISPLAY -I/usr/local/include
+CFLAGS  = -g -O3 -Wall -std=c++0x -pthread -DHD44780 -DADAFRUIT_DISPLAY -I/usr/local/include
 LIBS    = -lwiringPi -lwiringPiDev -lpthread
 LDFLAGS = -g -L/usr/local/lib
 
diff --git a/Makefile.Pi.HD44780 b/Makefile.Pi.HD44780
index 9294ead..e44d606 100644
--- a/Makefile.Pi.HD44780
+++ b/Makefile.Pi.HD44780
@@ -2,7 +2,7 @@
 
 CC      = gcc
 CXX     = g++
-CFLAGS  = -g -O3 -Wall -std=c++0x -DHD44780 -I/usr/local/include
+CFLAGS  = -g -O3 -Wall -std=c++0x -pthread -DHD44780 -I/usr/local/include
 LIBS    = -lwiringPi -lwiringPiDev -lpthread
 LDFLAGS = -g -L/usr/local/lib
 
diff --git a/Makefile.Pi.OLED b/Makefile.Pi.OLED
index 95298f7..7af4bed 100644
--- a/Makefile.Pi.OLED
+++ b/Makefile.Pi.OLED
@@ -2,8 +2,8 @@
 
 CC      = gcc
 CXX     = g++
-CFLAGS  = -g -O3 -Wall -std=c++0x -DOLED -I/usr/local/include
-LIBS    = -lArduiPi_OLED
+CFLAGS  = -g -O3 -Wall -std=c++0x -pthread -DOLED -I/usr/local/include
+LIBS    = -lArduiPi_OLED -lpthread
 LDFLAGS = -g -L/usr/local/lib
 
 OBJECTS = \
diff --git a/Thread.cpp b/Thread.cpp
index 9f43374..b334436 100644
--- a/Thread.cpp
+++ b/Thread.cpp
@@ -61,6 +61,8 @@ void CThread::sleep(unsigned int ms)
 
 #else
 
+#include <unistd.h>
+
 CThread::CThread() :
 m_thread()
 {
diff --git a/Thread.h b/Thread.h
index 8a6843f..352d938 100644
--- a/Thread.h
+++ b/Thread.h
@@ -41,7 +41,7 @@ public:
 
 private:
 #if defined(_WIN32) || defined(_WIN64)
-	HANDLE    m_handle;
+  HANDLE    m_handle;
 #else
   pthread_t m_thread;
 #endif