diff --git a/src/mainboard/asus/p2b-d/mptable.c b/src/mainboard/asus/p2b-d/mptable.c
index 03bc613..b237c56 100644
--- a/src/mainboard/asus/p2b-d/mptable.c
+++ b/src/mainboard/asus/p2b-d/mptable.c
@@ -24,7 +24,7 @@
 #include <string.h>
 #include <stdint.h>
 
-void *smp_write_config_table(void *v)
+static void *smp_write_config_table(void *v)
 {
 	static const char sig[4] = "PCMP";
 	static const char oem[8] = "COREBOOT";