diff --git a/cpu/ppc4xx/speed.c b/cpu/ppc4xx/speed.c
index dfd2a04..e776050 100644
--- a/cpu/ppc4xx/speed.c
+++ b/cpu/ppc4xx/speed.c
@@ -299,6 +299,10 @@
 	return sys_info.freqOPB;
 }
 
+#elif defined(CONFIG_XILINX_ML300)
+extern void get_sys_info (sys_info_t * sysInfo);
+extern ulong get_PCI_freq (void);
+
 #elif defined(CONFIG_405)
 
 void get_sys_info (sys_info_t * sysInfo) {