diff --git a/include/cantera/zeroD/ConstPressureReactor.h b/include/cantera/zeroD/ConstPressureReactor.h
index ffef058ceb..c5b5c86ec7 100644
--- a/include/cantera/zeroD/ConstPressureReactor.h
+++ b/include/cantera/zeroD/ConstPressureReactor.h
@@ -39,8 +39,9 @@ class ConstPressureReactor : public Reactor
     virtual void updateState(doublereal* y);
 
     //! Return the index in the solution vector for this reactor of the
-    //! component named *nm*. Possible values for *nm* are "m", "H", the name
-    //! of a homogeneous phase species, or the name of a surface species.
+    //! component named *nm*. Possible values for *nm* are "mass", "enthalpy",
+    //! the name of a homogeneous phase species, or the name of a surface
+    //! species.
     virtual size_t componentIndex(const std::string& nm) const;
 };
 
diff --git a/include/cantera/zeroD/IdealGasConstPressureReactor.h b/include/cantera/zeroD/IdealGasConstPressureReactor.h
index f0eb0c739f..2546b8f4bc 100644
--- a/include/cantera/zeroD/IdealGasConstPressureReactor.h
+++ b/include/cantera/zeroD/IdealGasConstPressureReactor.h
@@ -41,8 +41,9 @@ class IdealGasConstPressureReactor : public ConstPressureReactor
     virtual void updateState(doublereal* y);
 
     //! Return the index in the solution vector for this reactor of the
-    //! component named *nm*. Possible values for *nm* are "m", "T", the name
-    //! of a homogeneous phase species, or the name of a surface species.
+    //! component named *nm*. Possible values for *nm* are "mass",
+    //! "temperature", the name of a homogeneous phase species, or the name of a
+    //! surface species.
     virtual size_t componentIndex(const std::string& nm) const;
 
 protected:
diff --git a/include/cantera/zeroD/IdealGasReactor.h b/include/cantera/zeroD/IdealGasReactor.h
index b214d77ecc..ada758cda9 100644
--- a/include/cantera/zeroD/IdealGasReactor.h
+++ b/include/cantera/zeroD/IdealGasReactor.h
@@ -38,6 +38,10 @@ class IdealGasReactor : public Reactor
 
     virtual void updateState(doublereal* y);
 
+    //! Return the index in the solution vector for this reactor of the
+    //! component named *nm*. Possible values for *nm* are "mass",
+    //! "volume", "temperature", the name of a homogeneous phase species, or the
+    //! name of a surface species.
     virtual size_t componentIndex(const std::string& nm) const;
 
 protected:
diff --git a/include/cantera/zeroD/Reactor.h b/include/cantera/zeroD/Reactor.h
index 090142cdfa..f16619efa1 100644
--- a/include/cantera/zeroD/Reactor.h
+++ b/include/cantera/zeroD/Reactor.h
@@ -142,8 +142,9 @@ class Reactor : public ReactorBase
     std::vector<std::pair<void*, int> > getSensitivityOrder() const;
 
     //! Return the index in the solution vector for this reactor of the
-    //! component named *nm*. Possible values for *nm* are "m", "V", "T", the
-    //! name of a homogeneous phase species, or the name of a surface species.
+    //! component named *nm*. Possible values for *nm* are "mass", "volume",
+    //! "int_energy", the name of a homogeneous phase species, or the name of a
+    //! surface species.
     virtual size_t componentIndex(const std::string& nm) const;
 
 protected:
diff --git a/src/zeroD/ConstPressureReactor.cpp b/src/zeroD/ConstPressureReactor.cpp
index 766198d0a0..b230d02012 100644
--- a/src/zeroD/ConstPressureReactor.cpp
+++ b/src/zeroD/ConstPressureReactor.cpp
@@ -127,8 +127,18 @@ size_t ConstPressureReactor::componentIndex(const string& nm) const
     if (k != npos) {
         return k + 2;
     } else if (nm == "m" || nm == "mass") {
+        if (nm == "m") {
+            warn_deprecated("ConstPressureReactor::componentIndex(\"m\")",
+                "Using the name 'm' for mass is deprecated, and will be "
+                "disabled after Cantera 2.3. Use 'mass' instead.");
+        }
         return 0;
     } else if (nm == "H" || nm == "enthalpy") {
+        if (nm == "H") {
+            warn_deprecated("ConstPressureReactor::componentIndex(\"H\")",
+                "Using the name 'H' for enthalpy is deprecated, and will be "
+                "disabled after Cantera 2.3. Use 'enthalpy' instead.");
+        }
         return 1;
     } else {
         return npos;
diff --git a/src/zeroD/IdealGasConstPressureReactor.cpp b/src/zeroD/IdealGasConstPressureReactor.cpp
index 413fad98cd..2454c4150e 100644
--- a/src/zeroD/IdealGasConstPressureReactor.cpp
+++ b/src/zeroD/IdealGasConstPressureReactor.cpp
@@ -139,8 +139,18 @@ size_t IdealGasConstPressureReactor::componentIndex(const string& nm) const
     if (k != npos) {
         return k + 2;
     } else if (nm == "m" || nm == "mass") {
+        if (nm == "m") {
+            warn_deprecated("IdealGasConstPressureReactor::componentIndex(\"m\")",
+                "Using the name 'm' for mass is deprecated, and will be "
+                "disabled after Cantera 2.3. Use 'mass' instead.");
+        }
         return 0;
     } else if (nm == "T" || nm == "temperature") {
+        if (nm == "T") {
+            warn_deprecated("IdealGasConstPressureReactor::componentIndex(\"T\")",
+                "Using the name 'T' for temperature is deprecated, and will be "
+                "disabled after Cantera 2.3. Use 'temperature' instead.");
+        }
         return 1;
     } else {
         return npos;
diff --git a/src/zeroD/IdealGasReactor.cpp b/src/zeroD/IdealGasReactor.cpp
index 14906b06f3..560a244c4d 100644
--- a/src/zeroD/IdealGasReactor.cpp
+++ b/src/zeroD/IdealGasReactor.cpp
@@ -156,10 +156,25 @@ size_t IdealGasReactor::componentIndex(const string& nm) const
     if (k != npos) {
         return k + 3;
     } else if (nm == "m" || nm == "mass") {
+        if (nm == "m") {
+            warn_deprecated("IdealGasReactor::componentIndex(\"m\")",
+                "Using the name 'm' for mass is deprecated, and will be "
+                "disabled after Cantera 2.3. Use 'mass' instead.");
+        }
         return 0;
     } else if (nm == "V" || nm == "volume") {
+        if (nm == "V") {
+            warn_deprecated("IdealGasReactor::componentIndex(\"V\")",
+                "Using the name 'V' for volume is deprecated, and will be "
+                "disabled after Cantera 2.3. Use 'volume' instead.");
+        }
         return 1;
     } else if (nm == "T" || nm == "temperature") {
+        if (nm == "T") {
+            warn_deprecated("IdealGasReactor::componentIndex(\"T\")",
+                "Using the name 'T' for temperature is deprecated, and will be "
+                "disabled after Cantera 2.3. Use 'temperature' instead.");
+        }
         return 2;
     } else {
         return npos;
diff --git a/src/zeroD/Reactor.cpp b/src/zeroD/Reactor.cpp
index 8dbcdf0cf7..e229099df8 100644
--- a/src/zeroD/Reactor.cpp
+++ b/src/zeroD/Reactor.cpp
@@ -382,10 +382,25 @@ size_t Reactor::componentIndex(const string& nm) const
     if (k != npos) {
         return k + 3;
     } else if (nm == "m" || nm == "mass") {
+        if (nm == "m") {
+            warn_deprecated("Reactor::componentIndex(\"m\")",
+                "Using the name 'm' for mass is deprecated, and will be "
+                "disabled after Cantera 2.3. Use 'mass' instead.");
+        }
         return 0;
     } else if (nm == "V" || nm == "volume") {
+        if (nm == "V") {
+            warn_deprecated("Reactor::componentIndex(\"V\")",
+                "Using the name 'V' for volume is deprecated, and will be "
+                "disabled after Cantera 2.3. Use 'volume' instead.");
+        }
         return 1;
     } else if (nm == "U" || nm == "int_energy") {
+        if (nm == "U") {
+            warn_deprecated("Reactor::componentIndex(\"U\")",
+                "Using the name 'U' for internal energy is deprecated, and "
+                "will be disabled after Cantera 2.3. Use 'int_energy' instead.");
+        }
         return 2;
     } else {
         return npos;