diff --git a/src/Timer.c b/src/Timer.c
index 3f9f9d0..57e52e4 100644
--- a/src/Timer.c
+++ b/src/Timer.c
@@ -16,7 +16,8 @@ static void TimerPollKernelTimers()
 {
 	//EnterCritical();
 
-	for (unsigned hTimer = 0; hTimer < KERNEL_TIMERS; hTimer++)
+	unsigned hTimer;
+	for (hTimer = 0; hTimer < KERNEL_TIMERS; hTimer++)
 	{
 		volatile TKernelTimer* pTimer = &m_KernelTimer[hTimer];
 
@@ -71,7 +72,8 @@ void TimerSystemInitialize()
 	
 	DataMemBarrier();
 
-	for (unsigned hTimer = 0; hTimer < KERNEL_TIMERS; hTimer++)
+	unsigned hTimer;
+	for (hTimer = 0; hTimer < KERNEL_TIMERS; hTimer++)
 	{
 		m_KernelTimer[hTimer].m_pHandler = 0;
 	}
diff --git a/src/rpi-mailbox-interface.c b/src/rpi-mailbox-interface.c
index ed2272f..a65ba03 100644
--- a/src/rpi-mailbox-interface.c
+++ b/src/rpi-mailbox-interface.c
@@ -39,6 +39,8 @@ void RPI_PropertyAddTag( rpi_mailbox_tag_t tag, ... )
 {
 	int* ptr;
 	int value;
+	int index;
+
     va_list vl;
     va_start( vl, tag );
 
@@ -197,7 +199,7 @@ void RPI_PropertyAddTag( rpi_mailbox_tag_t tag, ... )
 			ptr++;
 			pt[pt_index++] = value;
 			{
-				for (int index = 0; index < value; ++index)
+				for (index = 0; index < value; ++index)
 				{
 					pt[pt_index++] = *ptr++;
 				}