diff --git a/envsetup.sh b/envsetup.sh
index bccf7c9..d15abcb 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -975,7 +975,7 @@
 }
 
 # simple shortcut to the runtest.py command
-function runtest.py()
+function runtest_py()
 {
     T=$(gettop)
     if [ ! "$T" ]; then