diff --git a/core/config.mk b/core/config.mk
index 07e9b3c2ee..bab31b7889 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -225,7 +225,7 @@ endef
 # Commands to generate .toc file from Darwin dynamic library.
 define _gen_toc_command_for_macho
 $(hide) otool -l $(1) | grep LC_ID_DYLIB -A 5 > $(2)
-$(hide) nm -gP $(1) | cut -f1-2 -d" " | grep -v U$$ >> $(2)
+$(hide) nm -gP $(1) | cut -f1-2 -d" " | (grep -v U$$ >> $(2) || true)
 endef
 
 combo_target := HOST_