diff --git a/src/add-ons/kernel/bus_managers/firewire/fwohci.cpp b/src/add-ons/kernel/bus_managers/firewire/fwohci.cpp
index 8a69683ae8..04ae2d2196 100644
--- a/src/add-ons/kernel/bus_managers/firewire/fwohci.cpp
+++ b/src/add-ons/kernel/bus_managers/firewire/fwohci.cpp
@@ -150,7 +150,7 @@ static void fwohci_task_dma(void *);
 /*
  * memory allocated for DMA programs
  */
-#define DMA_PROG_ALLOC		(8 * PAGE_SIZE)
+#define DMA_PROG_ALLOC		(8 * B_PAGE_SIZE)
 
 #define NDB FWMAXQUEUE
 
diff --git a/src/add-ons/kernel/drivers/audio/echo/generic/CDaffyDuck.cpp b/src/add-ons/kernel/drivers/audio/echo/generic/CDaffyDuck.cpp
index ec4f1b4610..d332cc6c9d 100644
--- a/src/add-ons/kernel/drivers/audio/echo/generic/CDaffyDuck.cpp
+++ b/src/add-ons/kernel/drivers/audio/echo/generic/CDaffyDuck.cpp
@@ -111,7 +111,7 @@ CDaffyDuck::~CDaffyDuck()
 {
 
 	if (NULL != m_pDuckPage)
-		m_pOsSupport->FreePhysPageBlock( PAGE_SIZE, m_pDuckPage);
+		m_pOsSupport->FreePhysPageBlock( B_PAGE_SIZE, m_pDuckPage);
 	
 }	// CDaffyDuck::~CDaffyDuck()
 
@@ -823,7 +823,7 @@ CDaffyDuck * CDaffyDuck::MakeDaffyDuck(COsSupport *pOsSupport)
 	PHYS_ADDR PhysAddr;
 	PPAGE_BLOCK pPageBlock;
 	
-	Status = pOsSupport->AllocPhysPageBlock( PAGE_SIZE, pPageBlock);
+	Status = pOsSupport->AllocPhysPageBlock( B_PAGE_SIZE, pPageBlock);
 	if (ECHOSTATUS_OK != Status)
 	{
 		ECHO_DEBUGPRINTF(("CDaffyDuck::CDaffyDuck - duck entry page block malloc failed\n"));
diff --git a/src/libs/compat/freebsd_network/Jamfile b/src/libs/compat/freebsd_network/Jamfile
index fff177a61b..3d7b496a88 100644
--- a/src/libs/compat/freebsd_network/Jamfile
+++ b/src/libs/compat/freebsd_network/Jamfile
@@ -10,7 +10,7 @@ UseHeaders $(HAIKU_PRIVATE_KERNEL_HEADERS) : true ;
 Includes [ FGristFiles kernel_c++_structs.h ]
 	: <src!system!kernel>kernel_c++_struct_sizes.h ;
 
-SubDirCcFlags [ FDefines _KERNEL=1 ] ;
+SubDirCcFlags [ FDefines _KERNEL=1 _XOPEN_SOURCE ] ;
 
 KernelStaticLibrary libfreebsd_network.a :
 	bus.cpp