diff --git a/arch/powerpc/platforms/powermac/pfunc_base.c b/arch/powerpc/platforms/powermac/pfunc_base.c
index 4ffd2a9832a0..9b7150f10414 100644
--- a/arch/powerpc/platforms/powermac/pfunc_base.c
+++ b/arch/powerpc/platforms/powermac/pfunc_base.c
@@ -9,7 +9,12 @@
 #include <asm/pmac_feature.h>
 #include <asm/pmac_pfunc.h>
 
+#undef DEBUG
+#ifdef DEBUG
 #define DBG(fmt...)	printk(fmt)
+#else
+#define DBG(fmt...)
+#endif
 
 static irqreturn_t macio_gpio_irq(int irq, void *data, struct pt_regs *regs)
 {
diff --git a/arch/powerpc/platforms/powermac/pfunc_core.c b/arch/powerpc/platforms/powermac/pfunc_core.c
index 356a739e52b2..4baa75b1d36f 100644
--- a/arch/powerpc/platforms/powermac/pfunc_core.c
+++ b/arch/powerpc/platforms/powermac/pfunc_core.c
@@ -20,7 +20,13 @@
 #define LOG_PARSE(fmt...)
 #define LOG_ERROR(fmt...)	printk(fmt)
 #define LOG_BLOB(t,b,c)
+
+#undef DEBUG
+#ifdef DEBUG
 #define DBG(fmt...)		printk(fmt)
+#else
+#define DBG(fmt...)
+#endif
 
 /* Command numbers */
 #define PMF_CMD_LIST			0