diff --git a/PowerEditor/src/NppBigSwitch.cpp b/PowerEditor/src/NppBigSwitch.cpp
index e9437f906..8daa47b16 100644
--- a/PowerEditor/src/NppBigSwitch.cpp
+++ b/PowerEditor/src/NppBigSwitch.cpp
@@ -1560,19 +1560,6 @@ LRESULT Notepad_plus::process(HWND hwnd, UINT message, WPARAM wParam, LPARAM lPa
 			return TRUE;
 		}
 
-		case NPPM_INTERNAL_GETCHECKDOCOPT:
-		{
-			return (LRESULT)(pNppParam->getNppGUI())._fileAutoDetection;
-		}
-
-		case NPPM_INTERNAL_SETCHECKDOCOPT:
-		{
-			// If nothing is changed by user, then we allow to set this value
-			if ((const_cast<NppGUI &>(pNppParam->getNppGUI()))._fileAutoDetection == (pNppParam->getNppGUI())._fileAutoDetectionOriginalValue)
-				(const_cast<NppGUI &>(pNppParam->getNppGUI()))._fileAutoDetection = (ChangeDetect)wParam;
-			return TRUE;
-		}
-
 		case NPPM_GETPOSFROMBUFFERID:
 		{
 			int i;
diff --git a/PowerEditor/src/Parameters.cpp b/PowerEditor/src/Parameters.cpp
index f0a896a59..10b809867 100644
--- a/PowerEditor/src/Parameters.cpp
+++ b/PowerEditor/src/Parameters.cpp
@@ -4203,8 +4203,6 @@ void NppParameters::feedGUIParameters(TiXmlNode *node)
 						_nppGUI._fileAutoDetection = (cdEnabledCurrent | cdAutoUpdate | cdGo2end);
 					else //(!lstrcmp(val, TEXT("no")))
 						_nppGUI._fileAutoDetection = cdDisabled;
-
-					_nppGUI._fileAutoDetectionOriginalValue = _nppGUI._fileAutoDetection;
 				}
 			}
 		}
diff --git a/PowerEditor/src/Parameters.h b/PowerEditor/src/Parameters.h
index f39969e13..62daa2e0c 100644
--- a/PowerEditor/src/Parameters.h
+++ b/PowerEditor/src/Parameters.h
@@ -789,7 +789,7 @@ struct NppGUI final
 	bool _tabReplacedBySpace = false;
 
 	int _fileAutoDetection = cdEnabledAll;
-	int _fileAutoDetectionOriginalValue = cdEnabledAll;
+
 	bool _checkHistoryFiles = false;
 
 	RECT _appPos;
diff --git a/PowerEditor/src/resource.h b/PowerEditor/src/resource.h
index fb91891f6..c09479de8 100644
--- a/PowerEditor/src/resource.h
+++ b/PowerEditor/src/resource.h
@@ -457,11 +457,6 @@
     	#define CHECKDOCOPT_UPDATESILENTLY 1
     	#define CHECKDOCOPT_UPDATEGO2END 2
 
-	#define NPPM_INTERNAL_GETCHECKDOCOPT (NPPMSG + 55)
-    // INT NPPM_GETCHECKDOCOPT(0, 0)
-	#define NPPM_INTERNAL_SETCHECKDOCOPT (NPPMSG + 56)
-    // INT NPPM_SETCHECKDOCOPT(OPT, 0)
-
     //
     // Used by netnote plugin
     //