diff --git a/c/src/lib/libbsp/powerpc/psim/ChangeLog b/c/src/lib/libbsp/powerpc/psim/ChangeLog
index 2600ffd5ba..5a9e468352 100644
--- a/c/src/lib/libbsp/powerpc/psim/ChangeLog
+++ b/c/src/lib/libbsp/powerpc/psim/ChangeLog
@@ -1,3 +1,10 @@
+2007-11-30	Till Straumann <strauman@slac.stanford.edu>
+	* irq/irq.h, irq/irq_init.c: Removed the definition
+	of ASM_IRQ_VECTOR_BASE; this symbol was only use to
+	initialize the irqBase member of the rtems_irq_global_settings
+	struct. However, irqBase is an rtems_irq_symbolic_name,
+	so using BSP_LOWEST_OFFSET is more appropriate.
+
 2007-11-30	Till Straumann <strauman@slac.stanford.edu>
 	* irq/irq.h, irq/irq.c (removed), irq/no_pic.c (added),
 	irq/irq_init.c, Makefile.am: The PSIM BSP (currently)
diff --git a/c/src/lib/libbsp/powerpc/psim/irq/irq.h b/c/src/lib/libbsp/powerpc/psim/irq/irq.h
index a0d5f27d50..575fb1b1d4 100644
--- a/c/src/lib/libbsp/powerpc/psim/irq/irq.h
+++ b/c/src/lib/libbsp/powerpc/psim/irq/irq.h
@@ -24,8 +24,6 @@
 #define BSP_SHARED_HANDLER_SUPPORT      1
 #include <rtems/irq.h>
 
-#define BSP_ASM_IRQ_VECTOR_BASE 0x0
-
 #ifndef ASM
 
 /*
diff --git a/c/src/lib/libbsp/powerpc/psim/irq/irq_init.c b/c/src/lib/libbsp/powerpc/psim/irq/irq_init.c
index b61ec6601e..ee3168ff15 100644
--- a/c/src/lib/libbsp/powerpc/psim/irq/irq_init.c
+++ b/c/src/lib/libbsp/powerpc/psim/irq/irq_init.c
@@ -97,7 +97,7 @@ void BSP_rtems_irq_mng_init(unsigned cpuId)
     initial_config.irqNb 	= BSP_IRQ_NUMBER;
     initial_config.defaultEntry = defaultIrq;
     initial_config.irqHdlTbl	= rtemsIrq;
-    initial_config.irqBase	= BSP_ASM_IRQ_VECTOR_BASE;
+    initial_config.irqBase	= BSP_LOWEST_OFFSET;
     initial_config.irqPrioTbl	= irqPrioTable;
 
     if (!BSP_rtems_irq_mngt_set(&initial_config)) {