diff --git a/src/doxygen.cpp b/src/doxygen.cpp
index fcf1039c5bd..97c49e00589 100644
--- a/src/doxygen.cpp
+++ b/src/doxygen.cpp
@@ -11407,6 +11407,10 @@ void adjustConfiguration()
         "Check the 'INPUT_ENCODING' setting in the config file!\n",
         qPrint(Config_getString(INPUT_ENCODING)),qPrint("UTF-8"),strerror(errno));
   }
+  else
+  {
+    portable_iconv_close(cd);
+  }
 
   // check and split INPUT_FILE_ENCODING
   const StringVector &fileEncod = Config_getList(INPUT_FILE_ENCODING);
@@ -11434,6 +11438,10 @@ void adjustConfiguration()
             "Check the 'INPUT_FILE_ENCODING' setting in the config file!\n",
             qPrint(encoding),qPrint("UTF-8"),strerror(errno));
       }
+      else
+      {
+        portable_iconv_close(cd);
+      }
 
       Doxygen::inputFileEncoding.push_back(InputFileEncoding(pattern, encoding));
     }