diff --git a/doc/generate_mdb_doc b/doc/generate_mdb_doc
index d53d89d822..a02c8385c6 100755
--- a/doc/generate_mdb_doc
+++ b/doc/generate_mdb_doc
@@ -11,12 +11,12 @@ cat mdb_categories > mdb_doc
 tmp="mdb_doc_tmp.$$"
 trap '/bin/rm -f $tmp' 0 1 2 3 15
 
-info -f mercury_user_guide.info -o $tmp -n "Mercury debugger concepts"
+info -f ./mercury_user_guide.info -o $tmp -n "Mercury debugger concepts"
 ../util/info_to_mdb concepts $tmp >> mdb_doc
 
 debug_cmd_path="debug debugger"
 for section in forward backward browsing breakpoint parameter help exp developer misc
 do
-	info -f mercury_user_guide.info -o $tmp $debug_cmd_path $section
+	info -f ./mercury_user_guide.info -o $tmp $debug_cmd_path $section
 	../util/info_to_mdb $section $tmp >> mdb_doc
 done