diff --git a/doc/grid_graph_export_svg.sh b/doc/grid_graph_export_svg.sh
index 03e7cb9c..d12ea216 100755
--- a/doc/grid_graph_export_svg.sh
+++ b/doc/grid_graph_export_svg.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 #=======================================================================
 # Copyright 2009 Trustees of Indiana University.
@@ -16,4 +16,4 @@ inkscape --export-png grid_graph_unwrapped.png --export-id g3150 --export-id-onl
 inkscape --export-png grid_graph_wrapped.png grid_graph_unindexed.svg
 
 # Indexed, unwrapped
-inkscape --export-png grid_graph_indexed.png grid_graph_indexed.svg
\ No newline at end of file
+inkscape --export-png grid_graph_indexed.png grid_graph_indexed.svg