diff --git a/asdf.sh b/asdf.sh
index 0095c855..429f82ca 100644
--- a/asdf.sh
+++ b/asdf.sh
@@ -1,5 +1,10 @@
 #!/usr/bin/env bash
 
-current_script_path=${BASH_SOURCE[0]}
+if [ "${BASH_SOURCE[0]}" != "" ]; then
+  current_script_path=${BASH_SOURCE[0]}
+else
+  current_script_path=$0
+fi
+
 asdf_dir=$(cd $(dirname $current_script_path); echo $(pwd))
 export PATH="${asdf_dir}/bin:${asdf_dir}/shims:$PATH"