diff --git a/tools/c-index-test/c-index-test.c b/tools/c-index-test/c-index-test.c
index dbd40b8..0dde4c7 100644
--- a/tools/c-index-test/c-index-test.c
+++ b/tools/c-index-test/c-index-test.c
@@ -717,6 +717,7 @@
           CXType Underlying = clang_getTypedefDeclUnderlyingType(Referenced);
           CXString S = clang_getTypeSpelling(Underlying);
           printf(" (Transparent: %s)", clang_getCString(S));
+          clang_disposeString(S);
         }
       }
     }