diff --git a/mk/config.mk.in b/mk/config.mk.in
index 3afa25d7cf701f0088f71d4060707c554f19f2ca..8b5879e7216781c0f84125e11791c3bfcf42f416 100644
--- a/mk/config.mk.in
+++ b/mk/config.mk.in
@@ -650,10 +650,10 @@ SGML2RTF		= $(DOCBOOK_PREFIX)db2rtf
 
 SGMLSTYLESHEET          = $(FPTOOLS_TOP_ABS)/docs/fptools-both.dsl
 
-SRC_SGML2DVI_OPTS       = -d $(SGMLSTYLESHEET)
-SRC_SGML2HTML_OPTS      = -d $(SGMLSTYLESHEET)
-SRC_SGML2PS_OPTS      	= -d $(SGMLSTYLESHEET)
-SRC_SGML2RTF_OPTS       = -d $(SGMLSTYLESHEET)
+SRC_SGML2DVI_OPTS       = $(DOCBOOK_CATALOG) -d $(SGMLSTYLESHEET)
+SRC_SGML2HTML_OPTS      = $(DOCBOOK_CATALOG) -d $(SGMLSTYLESHEET)
+SRC_SGML2PS_OPTS      	= $(DOCBOOK_CATALOG) -d $(SGMLSTYLESHEET)
+SRC_SGML2RTF_OPTS       = $(DOCBOOK_CATALOG) -d $(SGMLSTYLESHEET)
 
 DOCBOOK_CATALOG		= $(FPTOOLS_TOP_ABS)/@Catalog@