diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 8dfd43f..3bd6c84 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -57,6 +57,7 @@
 
 #include <mm/mmu_decl.h>
 #include <asm/udbg.h>
+#include <asm/debug.h>
 
 #ifdef DEBUG
 #define DBG(fmt...) udbg_printf(fmt)