diff --git a/src/system/boot/platform/openfirmware/arch/ppc/mmu.cpp b/src/system/boot/platform/openfirmware/arch/ppc/mmu.cpp
index f21d91022d..26a95e38e0 100644
--- a/src/system/boot/platform/openfirmware/arch/ppc/mmu.cpp
+++ b/src/system/boot/platform/openfirmware/arch/ppc/mmu.cpp
@@ -645,7 +645,7 @@ arch_set_callback(void)
 		puts("set-callback failed!");
 		return B_ERROR;
 	}
-	//printf("old callback = %p\n", old);
+	//printf("old callback = %p\n", oldCallback);
 
 	return B_OK;
 }