diff --git a/Makefile.am b/Makefile.am
index 267d42ae97..f4bc7899c3 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -3910,13 +3910,13 @@ man_nm_settings_xml = \
 if BUILD_SETTING_DOCS
 
 man/nm-settings.xml: man/nm-settings.xsl libnm/nm-settings-docs.xml
-	$(AM_V_GEN) xsltproc --output $@ $^
+	$(AM_V_GEN) xsltproc --output $@ $(xsltproc_flags) $^
 
 man/nm-settings-keyfile.xml: man/nm-settings-keyfile.xsl libnm/nm-settings-keyfile-docs.xml
-	$(AM_V_GEN) xsltproc --output $@ $^
+	$(AM_V_GEN) xsltproc --output $@ $(xsltproc_flags) $^
 
 man/nm-settings-ifcfg-rh.xml: man/nm-settings-ifcfg-rh.xsl libnm/nm-settings-ifcfg-rh-docs.xml
-	$(AM_V_GEN) xsltproc --output $@ $^
+	$(AM_V_GEN) xsltproc --output $@ $(xsltproc_flags) $^
 
 CLEANFILES += $(man_nm_settings_xml)