diff --git a/arch/mips/lantiq/prom.c b/arch/mips/lantiq/prom.c
index 4cbb000e778e..96773bed8a8a 100644
--- a/arch/mips/lantiq/prom.c
+++ b/arch/mips/lantiq/prom.c
@@ -25,6 +25,12 @@
 DEFINE_SPINLOCK(ebu_lock);
 EXPORT_SYMBOL_GPL(ebu_lock);
 
+/*
+ * This is needed by the VPE loader code, just set it to 0 and assume
+ * that the firmware hardcodes this value to something useful.
+ */
+unsigned long physical_memsize = 0L;
+
 /*
  * this struct is filled by the soc specific detection code and holds
  * information about the specific soc type, revision and name