diff --git a/src/common/inc/string_utilities.h b/src/common/inc/string_utilities.h
index b6b238ff..404aec3e 100644
--- a/src/common/inc/string_utilities.h
+++ b/src/common/inc/string_utilities.h
@@ -40,6 +40,19 @@ StringUtils_copyStringMax(char* dest, int maxBufferSize, const char* str1);
 LIB61850_INTERNAL char*
 StringUtils_copyStringToBuffer(const char* string, char* buffer);
 
+/**
+ * \brief Copy string to buffer and replace characters
+ *
+ * NOTE: str should be a 0 terminated string. The terminating 0 is also copied.
+ *
+ * \param str the source string to copy
+ * \param buffer the destination buffer
+ * \param oldChar the character that has to be replaced while copying
+ * \param newChar the replacement character
+ */
+LIB61850_INTERNAL char*
+StringUtils_copyStringToBufferAndReplace(const char* str, char* buffer, char oldChar, char newChar);
+
 LIB61850_INTERNAL char*
 StringUtils_copySubString(char* startPos, char* endPos);
 
diff --git a/src/common/string_utilities.c b/src/common/string_utilities.c
index abf9a04c..2f659e6f 100644
--- a/src/common/string_utilities.c
+++ b/src/common/string_utilities.c
@@ -1,7 +1,7 @@
 /*
  *  string_utilities.c
  *
- *  Copyright 2013 Michael Zillgith
+ *  Copyright 2013-2023 Michael Zillgith
  *
  *	This file is part of libIEC61850.
  *
@@ -65,6 +65,27 @@ StringUtils_copyStringToBuffer(const char* string, char* buffer)
     return buffer;
 }
 
+char*
+StringUtils_copyStringToBufferAndReplace(const char* str, char* buffer, char oldChar, char newChar)
+{
+    int i = 0;
+
+    while (true)
+    {
+        if (str[i] == oldChar)
+            buffer[i] = newChar;
+        else
+            buffer[i] = str[i];
+
+        if (str[i] == 0)
+            break;
+
+        i++;
+    }
+
+    return buffer;
+}
+
 
 char*
 StringUtils_createStringFromBuffer(const uint8_t* buf, int size)
diff --git a/src/iec61850/server/mms_mapping/mms_mapping.c b/src/iec61850/server/mms_mapping/mms_mapping.c
index 1d4d86c1..27471a58 100644
--- a/src/iec61850/server/mms_mapping/mms_mapping.c
+++ b/src/iec61850/server/mms_mapping/mms_mapping.c
@@ -3497,7 +3497,7 @@ mmsListObjectsAccessHandler(void* parameter, MmsGetNameListType listType, MmsDom
 
                                 StringUtils_createStringFromBufferInBuffer(str, (uint8_t*) (doStart + 1), doEnd - doStart);
 
-                                subObjectName = StringUtils_copyStringToBuffer(doEnd + 2, subObjectBuf);
+                                subObjectName = StringUtils_copyStringToBufferAndReplace(doEnd + 2, subObjectBuf, '$', '.');
                             }
                         }
                     }
@@ -3564,7 +3564,7 @@ mmsListObjectsAccessHandler(void* parameter, MmsGetNameListType listType, MmsDom
 
                                 StringUtils_createStringFromBufferInBuffer(str, (uint8_t*) (doStart + 1), doEnd - doStart);
 
-                                subObjectName = StringUtils_copyStringToBuffer(doEnd + 2, subObjectBuf);
+                                subObjectName = StringUtils_copyStringToBufferAndReplace(doEnd + 2, subObjectBuf, '$', '.');
                             }
 
                             if (fc == IEC61850_FC_SP) {