diff --git a/src/add-ons/kernel/drivers/network/bcm440x/b44mm.h b/src/add-ons/kernel/drivers/network/bcm440x/b44mm.h
index 3f250a235b..53f810bae3 100644
--- a/src/add-ons/kernel/drivers/network/bcm440x/b44mm.h
+++ b/src/add-ons/kernel/drivers/network/bcm440x/b44mm.h
@@ -44,9 +44,13 @@ typedef vint32 MM_ATOMIC_T;
 #ifdef __INTEL__
 #define mb()    __asm__ __volatile__ ("lock; addl $0,0(%%esp)": : :"memory") 
 #else
+#ifdef __HAIKU__
+#define mb()	memory_write_barrier()
+#else
 #warning no memory barrier function defined.
 #define mb()
 #endif
+#endif
 #define wmb()    mb()
 
 #define readl(addr) (*(volatile unsigned int *) __io_virt(addr))
diff --git a/src/add-ons/kernel/drivers/network/bcm570x/mm.h b/src/add-ons/kernel/drivers/network/bcm570x/mm.h
index e0d1ff7d07..10709878ad 100644
--- a/src/add-ons/kernel/drivers/network/bcm570x/mm.h
+++ b/src/add-ons/kernel/drivers/network/bcm570x/mm.h
@@ -44,9 +44,13 @@ typedef vint32 MM_ATOMIC_T;
 #ifdef __INTEL__
 #define mb()    __asm__ __volatile__ ("lock; addl $0,0(%%esp)": : :"memory") 
 #else
+#ifdef __HAIKU__
+#define mb()	memory_write_barrier()
+#else
 #warning no memory barrier function defined.
 #define mb()	
 #endif
+#endif
 #define wmb()    mb()
 #define rmb()    mb()