diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index a96d90d7c442..5a4d59a1070d 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -577,7 +577,7 @@ void tick_broadcast(const struct cpumask *mask)
 #endif
 
 #ifdef CONFIG_DEBUGGER
-void debugger_ipi_callback(struct pt_regs *regs)
+static void debugger_ipi_callback(struct pt_regs *regs)
 {
 	debugger_ipi(regs);
 }