diff --git a/glafp-utils/docbook/db2dvi.dir/db2dvi.sh b/glafp-utils/docbook/db2dvi.dir/db2dvi.sh
index e0c8288f9a85b8e235a8b5f007546ac540995467..ea1f065219534ed6e2b99a7b33e9655d08847170 100644
--- a/glafp-utils/docbook/db2dvi.dir/db2dvi.sh
+++ b/glafp-utils/docbook/db2dvi.dir/db2dvi.sh
@@ -4,7 +4,7 @@ if [ ! -f "$DOCBOOK_CATALOG" ] && [ ! -f "$SGML_CATALOG_FILES" ] ; then
 fi
 
 if [ -f "$DOCBOOK_CATALOG" ] ; then
-  CATALOG_OPTION=-c $DOCBOOK_CATALOG
+  CATALOG_OPTION="-c $DOCBOOK_CATALOG"
 fi
 
 # Dave Mason's option to specify a different stylesheet