diff --git a/ext/yaml-cpp b/ext/yaml-cpp
index 86ae3a5aa7e..01226975614 160000
--- a/ext/yaml-cpp
+++ b/ext/yaml-cpp
@@ -1 +1 @@
-Subproject commit 86ae3a5aa7e2109d849b2df89176d6432a35265d
+Subproject commit 012269756149ae99745b6dafefd415843d7420bb
diff --git a/include/cantera/base/AnyMap.h b/include/cantera/base/AnyMap.h
index af3cf847b9e..7e1add7043b 100644
--- a/include/cantera/base/AnyMap.h
+++ b/include/cantera/base/AnyMap.h
@@ -289,7 +289,7 @@ std::vector<vector_fp>& AnyValue::asVector<vector_fp>(size_t nMin, size_t nMax);
 class AnyMap
 {
 public:
-    AnyMap() {};
+    AnyMap(): m_units() {};
 
     //! Create an AnyMap from a YAML file.
     /*!