diff --git a/include/cantera/clib/ct.h b/include/cantera/clib/ct.h
index 90e36333e4..c42c2e1d03 100644
--- a/include/cantera/clib/ct.h
+++ b/include/cantera/clib/ct.h
@@ -66,7 +66,7 @@ extern "C" {
     CANTERA_CAPI size_t thermo_elementIndex(int n, const char* nm);
     CANTERA_CAPI size_t thermo_speciesIndex(int n, const char* nm);
     //! @since Changed signature in %Cantera 3.1
-    CANTERA_CAPI int thermo_report3(int nth, int show_thermo, double threshold, int ibuf, char* buf);
+    CANTERA_CAPI int thermo_report(int nth, int show_thermo, double threshold, int ibuf, char* buf);
     CANTERA_CAPI int thermo_print(int nth, int show_thermo, double threshold);
     CANTERA_CAPI double thermo_nAtoms(int n, size_t k, size_t m);
     CANTERA_CAPI int thermo_addElement(int n, const char* name, double weight);
@@ -182,7 +182,7 @@ extern "C" {
     CANTERA_CAPI int ct_setLogCallback(LogCallback writer);
     CANTERA_CAPI int ct_addCanteraDirectory(size_t buflen, const char* buf);
     //! @since Changed signature in %Cantera 3.1
-    CANTERA_CAPI int ct_getDataDirectories3(const char* sep, int buflen, char* buf);
+    CANTERA_CAPI int ct_getDataDirectories(const char* sep, int buflen, char* buf);
     CANTERA_CAPI int ct_getCanteraVersion(int buflen, char* buf);
     CANTERA_CAPI int ct_getGitCommit(int buflen, char* buf);
     CANTERA_CAPI int ct_suppress_thermo_warnings(int suppress);
diff --git a/interfaces/dotnet/Cantera/src/DataDirectoryCollection.cs b/interfaces/dotnet/Cantera/src/DataDirectoryCollection.cs
index bbbf301ebf..1d89c71971 100644
--- a/interfaces/dotnet/Cantera/src/DataDirectoryCollection.cs
+++ b/interfaces/dotnet/Cantera/src/DataDirectoryCollection.cs
@@ -17,7 +17,7 @@ unsafe static IEnumerable<DirectoryInfo> GetDirs()
 
         return InteropUtil
             .GetString(500, (size, buffer) =>
-                LibCantera.ct_getDataDirectories3(sep.ToString(), size, buffer))
+                LibCantera.ct_getDataDirectories(sep.ToString(), size, buffer))
             .Split(sep)
             .Select(d => new DirectoryInfo(d));
     }
diff --git a/interfaces/matlab_experimental/Base/ThermoPhase.m b/interfaces/matlab_experimental/Base/ThermoPhase.m
index a25012227b..9e7e7c7fc7 100644
--- a/interfaces/matlab_experimental/Base/ThermoPhase.m
+++ b/interfaces/matlab_experimental/Base/ThermoPhase.m
@@ -980,7 +980,7 @@ function display(tp)
             if nargin < 2
                 threshold = 1e-14;
             end
-            str = ctString('thermo_report3', tp.tpID, 1, threshold);
+            str = ctString('thermo_report', tp.tpID, 1, threshold);
         end
 
         function n = get.speciesNames(tp)
diff --git a/interfaces/matlab_experimental/Utility/ctDataDirectories.m b/interfaces/matlab_experimental/Utility/ctDataDirectories.m
index f4e1ad97cf..b6b6a86324 100644
--- a/interfaces/matlab_experimental/Utility/ctDataDirectories.m
+++ b/interfaces/matlab_experimental/Utility/ctDataDirectories.m
@@ -9,5 +9,5 @@
     %     Cell array with strings representing the data file search directories
 
     ctIsLoaded;
-    d = ctString('ct_getDataDirectories3', ';');
+    d = ctString('ct_getDataDirectories', ';');
 end
diff --git a/src/clib/ct.cpp b/src/clib/ct.cpp
index 3b14a70ac4..2acd86856b 100644
--- a/src/clib/ct.cpp
+++ b/src/clib/ct.cpp
@@ -1586,7 +1586,7 @@ extern "C" {
 
     //-------------------- Functions ---------------------------
 
-    int thermo_report3(int nth, int show_thermo, double threshold, int ibuf, char* buf)
+    int thermo_report(int nth, int show_thermo, double threshold, int ibuf, char* buf)
     {
         try {
             bool stherm = (show_thermo != 0);
@@ -1630,7 +1630,7 @@ extern "C" {
         }
     }
 
-    int ct_getDataDirectories3(const char* sep, int buflen, char* buf)
+    int ct_getDataDirectories(const char* sep, int buflen, char* buf)
     {
         try {
             return static_cast<int>(copyString(getDataDirectories(sep), buf, buflen));