diff --git a/src/librustc/README.txt b/src/librustc/README.md
similarity index 100%
rename from src/librustc/README.txt
rename to src/librustc/README.md
diff --git a/src/librustc_trans/README.txt b/src/librustc_trans/README.txt
index 3904db4433c..1f416d5404d 100644
--- a/src/librustc_trans/README.txt
+++ b/src/librustc_trans/README.txt
@@ -1 +1 @@
-See the README.txt in ../librustc.
+See the README.md in ../librustc.