diff --git a/bootstrap b/bootstrap
index 2e856c4a..ca72d8f7 100755
--- a/bootstrap
+++ b/bootstrap
@@ -1,3 +1,5 @@
 #!/bin/sh
+test -n "$BASH_SOURCE" && workdir="${BASH_SOURCE[0]%/*}" && test -n "$workdir" && cd "$workdir" || \
+workdir=`dirname "$0"` && test -n "$workdir" && cd "$workdir" || echo "Warning: can't get working directory" 1>&2
 aclocal -I m4 --install
 autoreconf -I m4 -f -i