diff --git a/src/OSSupport/File.cpp b/src/OSSupport/File.cpp
index 1ee9feafe..8957dfaef 100644
--- a/src/OSSupport/File.cpp
+++ b/src/OSSupport/File.cpp
@@ -453,29 +453,6 @@ AString cFile::ReadWholeFile(const AString & a_FileName)
 
 
 
-AString cFile::ReplaceFileNameInvalidChars(const AString & a_FileName, char a_Replacement)
-{
-	AString res(a_FileName);
-	for (auto & ch: res)
-	{
-		switch (ch)
-		{
-			case ':':
-			case '\\':
-			case '/':
-			{
-				ch = a_Replacement;
-				break;
-			}
-		}
-	}
-	return res;
-}
-
-
-
-
-
 int cFile::Printf(const char * a_Fmt, ...)
 {
 	AString buf;
diff --git a/src/OSSupport/File.h b/src/OSSupport/File.h
index b39f71e28..ac6d1ab21 100644
--- a/src/OSSupport/File.h
+++ b/src/OSSupport/File.h
@@ -127,9 +127,6 @@ public:
 	/** Returns the entire contents of the specified file as a string. Returns empty string on error. */
 	static AString ReadWholeFile(const AString & a_FileName);
 
-	/** Replaces characters that cannot be in a file name with the specified char. */
-	static AString ReplaceFileNameInvalidChars(const AString & a_FileName, char a_Replacement = '_');
-	
 	// tolua_end
 	
 	/** Returns the list of all items in the specified folder (files, folders, nix pipes, whatever's there). */
diff --git a/src/Protocol/Protocol18x.cpp b/src/Protocol/Protocol18x.cpp
index 5d722d9fc..7d954a297 100644
--- a/src/Protocol/Protocol18x.cpp
+++ b/src/Protocol/Protocol18x.cpp
@@ -108,10 +108,12 @@ cProtocol180::cProtocol180(cClientHandle * a_Client, const AString & a_ServerAdd
 	{
 		static int sCounter = 0;
 		cFile::CreateFolder("CommLogs");
+		AString IP(a_Client->GetIPString());
+		ReplaceString(IP, ":", "_");
 		AString FileName = Printf("CommLogs/%x_%d__%s.log",
 			static_cast<unsigned>(time(nullptr)),
 			sCounter++,
-			cFile::ReplaceFileNameInvalidChars(a_Client->GetIPString()).c_str()
+			IP.c_str()
 		);
 		if (!m_CommLogFile.Open(FileName, cFile::fmWrite))
 		{