diff --git a/board/BuS/EB+MCF-EV123/mii.c b/board/BuS/EB+MCF-EV123/mii.c
index 3ea20a6..8ae2ec6 100644
--- a/board/BuS/EB+MCF-EV123/mii.c
+++ b/board/BuS/EB+MCF-EV123/mii.c
@@ -201,7 +201,7 @@
 }
 #endif				/* CFG_DISCOVER_PHY */
 
-int mii_init(void) __attribute__((weak,alias("__mii_init")));
+void mii_init(void) __attribute__((weak,alias("__mii_init")));
 
 void __mii_init(void)
 {
diff --git a/board/cobra5272/mii.c b/board/cobra5272/mii.c
index d0a4a39..b30ba80 100644
--- a/board/cobra5272/mii.c
+++ b/board/cobra5272/mii.c
@@ -200,7 +200,7 @@
 }
 #endif				/* CFG_DISCOVER_PHY */
 
-int mii_init(void) __attribute__((weak,alias("__mii_init")));
+void mii_init(void) __attribute__((weak,alias("__mii_init")));
 
 void __mii_init(void)
 {