diff --git a/include/cantera/base/SolutionArray.h b/include/cantera/base/SolutionArray.h
index 615d331a3..6bbaaab9b 100644
--- a/include/cantera/base/SolutionArray.h
+++ b/include/cantera/base/SolutionArray.h
@@ -231,8 +231,8 @@ public:
      *  @param overwrite  Force overwrite if sub exists; optional (default=false)
      *  @param compression  Compression level; optional (default=0; HDF only)
      */
-    string save(const string& fname, const string& id, const string& sub,
-                const string& desc, bool overwrite=false, int compression=0);
+    void save(const string& fname, const string& id, const string& sub,
+              const string& desc, bool overwrite=false, int compression=0);
 
     /*!
      *  Read header data from container file.
diff --git a/src/base/SolutionArray.cpp b/src/base/SolutionArray.cpp
index a5edaf51c..1e639eb60 100644
--- a/src/base/SolutionArray.cpp
+++ b/src/base/SolutionArray.cpp
@@ -781,7 +781,7 @@ void SolutionArray::append(const vector<double>& state, const AnyMap& extra)
     }
 }
 
-string SolutionArray::save(const string& fname, const string& id, const string& sub,
+void SolutionArray::save(const string& fname, const string& id, const string& sub,
                            const string& desc, bool overwrite, int compression)
 {
     if (m_size < m_dataSize) {
@@ -793,7 +793,7 @@ string SolutionArray::save(const string& fname, const string& id, const string&
     if (extension == "h5" || extension == "hdf"  || extension == "hdf5") {
         writeHeader(fname, id, desc, overwrite);
         writeEntry(fname, id, sub, true, compression);
-        return id;
+        return;
     }
     if (extension == "yaml" || extension == "yml") {
         // Check for an existing file and load it if present
@@ -808,7 +808,7 @@ string SolutionArray::save(const string& fname, const string& id, const string&
         std::ofstream out(fname);
         out << data.toYamlString();
         AnyMap::clearCachedFile(fname);
-        return id;
+        return;
     }
     throw CanteraError("SolutionArray::save",
                        "Unknown file extension '{}'.", extension);