diff --git a/mailnews/mime/cthandlers/calendar/Makefile.in b/mailnews/mime/cthandlers/calendar/Makefile.in
index d5428db063f..5fab227fb64 100644
--- a/mailnews/mime/cthandlers/calendar/Makefile.in
+++ b/mailnews/mime/cthandlers/calendar/Makefile.in
@@ -38,6 +38,7 @@ EXTRA_DSO_LDOPTS = 	\
 	-L$(DIST)/lib	\
 	-lxp			\
 	-lxpcom			\
+	-lreg			\
 	-lraptorbase	\
 	$(NULL)
 
diff --git a/mailnews/mime/cthandlers/vcard/Makefile.in b/mailnews/mime/cthandlers/vcard/Makefile.in
index e0afa31e53b..ce068099b04 100644
--- a/mailnews/mime/cthandlers/vcard/Makefile.in
+++ b/mailnews/mime/cthandlers/vcard/Makefile.in
@@ -49,6 +49,7 @@ EXTRA_DSO_LDOPTS = \
 	-lxp			\
 	-lraptorbase	\
 	-lxpcom			\
+	-lreg			\
 	$(NULL)
 
 include $(topsrcdir)/config/config.mk
diff --git a/mailnews/mime/emitters/html/Makefile.in b/mailnews/mime/emitters/html/Makefile.in
index 3752631c5e8..2837df82e1c 100644
--- a/mailnews/mime/emitters/html/Makefile.in
+++ b/mailnews/mime/emitters/html/Makefile.in
@@ -41,6 +41,7 @@ EXTRA_DSO_LDOPTS	= 	\
 	-lxp			\
 	-lraptorbase	\
 	-lxpcom			\
+	-lreg			\
 	$(NULL)
 
 include $(topsrcdir)/config/config.mk
diff --git a/mailnews/mime/src/Makefile.in b/mailnews/mime/src/Makefile.in
index 47d323113c8..0165785f7db 100644
--- a/mailnews/mime/src/Makefile.in
+++ b/mailnews/mime/src/Makefile.in
@@ -101,6 +101,7 @@ EXTRA_DSO_LDOPTS =	\
 	-lsecfree		\
 	-lxp			\
 	-lxpcom			\
+	-lreg			\
 	$(NULL)
 
 #