diff --git a/tcl/target/at91sam3u4e.cfg b/tcl/target/at91sam3u4e.cfg
index 6f6e0d873..a48f99265 100644
--- a/tcl/target/at91sam3u4e.cfg
+++ b/tcl/target/at91sam3u4e.cfg
@@ -1,5 +1,5 @@
 # common stuff
-source [find target/at91sam3uXX.cfg]
+source [find target/at91sam3uxx.cfg]
 
 # size is automatically "calculated" by probing
 set _FLASHNAME $_CHIPNAME.flash0