diff --git a/tools/build/mk/OptionalObsoleteFiles.inc b/tools/build/mk/OptionalObsoleteFiles.inc
index e13456600a3..ed39f7dc5a7 100644
--- a/tools/build/mk/OptionalObsoleteFiles.inc
+++ b/tools/build/mk/OptionalObsoleteFiles.inc
@@ -1751,7 +1751,7 @@ OLD_FILES+=usr/include/omp.h
 OLD_FILES+=usr/lib/libgcov.a
 OLD_FILES+=usr/lib/libgomp.a
 OLD_FILES+=usr/lib/libgomp.so
-OLD_FILES+=usr/lib/libgomp.so.1
+OLD_LIBS+=usr/lib/libgomp.so.1
 OLD_FILES+=usr/lib/libgomp_p.a
 OLD_FILES+=usr/libexec/cc1
 OLD_FILES+=usr/libexec/cc1plus