diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index e6cc38ef6945..5d9044e65a1a 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -386,7 +386,7 @@ union irq_stack_union {
 	volatile unsigned int lock[1];
 };
 
-DEFINE_PER_CPU(union irq_stack_union, irq_stack_union) = {
+static DEFINE_PER_CPU(union irq_stack_union, irq_stack_union) = {
 		.slock = { 1,1,1,1 },
 	};
 #endif