diff --git a/board/freescale/m5235evb/mii.c b/board/freescale/m5235evb/mii.c
index 58fabdf324cef7f7a59d59938f6eb057e3d11acc..1fd4d99c1e01a78669e054157fec7f94549eab89 100644
--- a/board/freescale/m5235evb/mii.c
+++ b/board/freescale/m5235evb/mii.c
@@ -204,7 +204,7 @@ int mii_discover_phy(struct eth_device *dev)
 }
 #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/freescale/m5329evb/mii.c b/board/freescale/m5329evb/mii.c
index 31f1510cc9f1f1d3c8d2c3a519d864ce3d5df310..8f6abf3eebe37f5341314c5bb12bae238b75d6ba 100644
--- a/board/freescale/m5329evb/mii.c
+++ b/board/freescale/m5329evb/mii.c
@@ -203,7 +203,7 @@ int mii_discover_phy(struct eth_device *dev)
 }
 #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/freescale/m54455evb/mii.c b/board/freescale/m54455evb/mii.c
index c067183aadf1200eea7ffcdd98ae4ff9a2c981b3..7a59aa06748b7279af6d1b033fb43b2d2000cfde 100644
--- a/board/freescale/m54455evb/mii.c
+++ b/board/freescale/m54455evb/mii.c
@@ -221,7 +221,7 @@ int mii_discover_phy(struct eth_device *dev)
 }
 #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/m5271evb/mii.c b/board/m5271evb/mii.c
index f6c63c302bc0fa02aa721c57d2f7e995a7ebb2d8..3830ce7f2854594c93db8d25e14954d2e5f2a993 100644
--- a/board/m5271evb/mii.c
+++ b/board/m5271evb/mii.c
@@ -200,7 +200,7 @@ int mii_discover_phy(struct eth_device *dev)
 }
 #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/m5272c3/mii.c b/board/m5272c3/mii.c
index fadcbb3ef8d565ca373888ac5b178432e14e201b..0ecc44ace26c6e4b2cfb4f82f0dec861d71c2f93 100644
--- a/board/m5272c3/mii.c
+++ b/board/m5272c3/mii.c
@@ -200,7 +200,7 @@ int mii_discover_phy(struct eth_device *dev)
 }
 #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/m5282evb/mii.c b/board/m5282evb/mii.c
index ebd3ed938747a5a633120c20ff8efc1bc03bba40..d7c6d1f0e396e5e4f0e42e8b0c207cfd0dd71695 100644
--- a/board/m5282evb/mii.c
+++ b/board/m5282evb/mii.c
@@ -201,7 +201,7 @@ int mii_discover_phy(struct eth_device *dev)
 }
 #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)
 {