diff --git a/nsprpub/lib/ds/Makefile.in b/nsprpub/lib/ds/Makefile.in
index 0525c021c462..0394a1b65724 100644
--- a/nsprpub/lib/ds/Makefile.in
+++ b/nsprpub/lib/ds/Makefile.in
@@ -67,6 +67,17 @@ endif # WINNT
 
 EXTRA_LIBS = $(LIBNSPR)
 
+# On NCR and SCOOS, we can't link with extra libraries when
+# we build a shared library.  If we do so, the linker doesn't
+# complain, but we would run into weird problems at run-time.
+# Therefore on these platforms, we link just the .o files.
+ifeq ($(OS_ARCH),NCR)
+EXTRA_LIBS =
+endif
+ifeq ($(OS_ARCH),SCOOS)
+EXTRA_LIBS =
+endif
+
 ifdef RESOLVE_LINK_SYMBOLS
 EXTRA_LIBS += $(OS_LIBS)
 endif