diff --git a/mozilla/config/rules.mk b/mozilla/config/rules.mk
index dc36e106950..8b0a024a314 100644
--- a/mozilla/config/rules.mk
+++ b/mozilla/config/rules.mk
@@ -519,6 +519,17 @@ endif # HAS_EXTRAEXPORTS
 endif # IS_COMPONENT
 endif # AIX
 
+#
+# OSF1: add -B symbolic flag for components
+#
+ifeq ($(OS_ARCH),OSF1)
+ifdef IS_COMPONENT
+ifeq ($(GNU_CC)$(GNU_CXX),)
+EXTRA_DSO_LDOPTS += -B symbolic
+endif  
+endif  
+endif
+
 #
 # Linux: add -Bsymbolic flag for components
 #