diff --git a/lldb/unittests/Core/MangledTest.cpp b/lldb/unittests/Core/MangledTest.cpp
index aaca4270d708a..44651eb94c23b 100644
--- a/lldb/unittests/Core/MangledTest.cpp
+++ b/lldb/unittests/Core/MangledTest.cpp
@@ -605,6 +605,7 @@ TEST_P(DemanglingPartsTestFixture, DemanglingParts) {
   EXPECT_EQ(get_part(OB.NameInfo.BasenameRange), basename);
   EXPECT_EQ(get_part(OB.NameInfo.ScopeRange), scope);
   EXPECT_EQ(get_part(OB.NameInfo.QualifiersRange), qualifiers);
+  std::free(OB.getBuffer());
 }
 
 INSTANTIATE_TEST_SUITE_P(DemanglingPartsTests, DemanglingPartsTestFixture,