diff --git a/src/southbridge/nvidia/mcp55/mcp55_aza.c b/src/southbridge/nvidia/mcp55/mcp55_aza.c
index 5b1a44ad60..b43c8fd281 100644
--- a/src/southbridge/nvidia/mcp55/mcp55_aza.c
+++ b/src/southbridge/nvidia/mcp55/mcp55_aza.c
@@ -27,6 +27,7 @@
 #include <device/pci_ids.h>
 #include <device/pci_ops.h>
 #include <arch/io.h>
+#include <delay.h>
 #include "mcp55.h"
 
 static int set_bits(uint8_t *port, uint32_t mask, uint32_t val)
diff --git a/src/southbridge/nvidia/mcp55/mcp55_nic.c b/src/southbridge/nvidia/mcp55/mcp55_nic.c
index 3d556549a2..89f9d0bbe8 100644
--- a/src/southbridge/nvidia/mcp55/mcp55_nic.c
+++ b/src/southbridge/nvidia/mcp55/mcp55_nic.c
@@ -28,6 +28,7 @@
 #include <device/pci_ids.h>
 #include <device/pci_ops.h>
 #include <arch/io.h>
+#include <delay.h>
 #include "mcp55.h"
 
 static int phy_read(uint8_t *base, unsigned phy_addr, unsigned phy_reg)