diff --git a/emsdk_env.sh b/emsdk_env.sh
index 0fb4c49..5c39ef6 100755
--- a/emsdk_env.sh
+++ b/emsdk_env.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-pushd `dirname "$_"` > /dev/null
+pushd `dirname "$BASH_SOURCE"` > /dev/null
 ./emsdk construct_env
 source ./emsdk_set_env.sh
 popd > /dev/null