diff --git a/configs/tuxx1_defconfig b/configs/tuxx1_defconfig
index d1fc626..a6654c9 100644
--- a/configs/tuxx1_defconfig
+++ b/configs/tuxx1_defconfig
@@ -1,5 +1,6 @@
 CONFIG_PPC=y
 CONFIG_SYS_TEXT_BASE=0xF0000000
+CONFIG_SYS_CLK_FREQ=66000000
 CONFIG_MPC83xx=y
 CONFIG_TARGET_TUXX1=y
 CONFIG_OF_BOARD_SETUP=y