diff --git a/include/dos_system.h b/include/dos_system.h
index eab510e7..34d99fc2 100644
--- a/include/dos_system.h
+++ b/include/dos_system.h
@@ -250,7 +250,7 @@ public:
 	virtual void Activate(void) {};
 };
 
-enum { OPEN_READ=0,OPEN_WRITE=1,OPEN_READWRITE=2, DOS_NOT_INHERIT=128};
+enum { OPEN_READ=0, OPEN_WRITE=1, OPEN_READWRITE=2, OPEN_READ_NO_MOD=4, DOS_NOT_INHERIT=128};
 enum { DOS_SEEK_SET=0,DOS_SEEK_CUR=1,DOS_SEEK_END=2};
 
 
diff --git a/src/dos/drive_local.cpp b/src/dos/drive_local.cpp
index f53cc0c4..50ae6f1c 100644
--- a/src/dos/drive_local.cpp
+++ b/src/dos/drive_local.cpp
@@ -83,9 +83,10 @@ bool localDrive::FileCreate(DOS_File * * file,char * name,Bit16u /*attributes*/)
 bool localDrive::FileOpen(DOS_File * * file,char * name,Bit32u flags) {
 	const char* type;
 	switch (flags&0xf) {
-	case OPEN_READ:type="rb"; break;
-	case OPEN_WRITE:type="rb+"; break;
-	case OPEN_READWRITE:type="rb+"; break;
+	case OPEN_READ:        type = "rb" ; break;
+	case OPEN_WRITE:       type = "rb+"; break;
+	case OPEN_READWRITE:   type = "rb+"; break;
+	case OPEN_READ_NO_MOD: type = "rb" ; break; //No modification of dates. LORD4.07 uses this
 	default:
 		DOS_SetError(DOSERR_ACCESS_CODE_INVALID);
 		return false;