diff --git a/mozilla/security/coreconf/OS2.mk b/mozilla/security/coreconf/OS2.mk
index b95328a3660..4c965531fa7 100644
--- a/mozilla/security/coreconf/OS2.mk
+++ b/mozilla/security/coreconf/OS2.mk
@@ -89,7 +89,7 @@ MKSHLIB                 = $(CXX) $(CXXFLAGS) $(DSO_LDOPTS) -o $@
 MKCSHLIB                = $(CC) $(CFLAGS) $(DSO_LDOPTS) -o $@
 MKSHLIB_FORCE_ALL       = 
 MKSHLIB_UNFORCE_ALL     = 
-DSO_LDOPTS              = -Zomf -Zdll
+DSO_LDOPTS              = -Zomf -Zdll -Zmap
 SHLIB_LDSTARTFILE	= 
 SHLIB_LDENDFILE		= 
 ifdef MAPFILE