1 files changed, 6 insertions, 6 deletions
diff --git a/src/CellBuffer.h b/src/CellBuffer.h
index e790a8196..c51eab78d 100644
--- a/src/CellBuffer.h
+++ b/src/CellBuffer.h
@@ -67,11 +67,11 @@ public:
 	void InsertLine(int line, int position);
 	void SetLineStart(int line, int position);
 	void RemoveLine(int line);
-	int Lines() {
+	int Lines() const {
 		return starts.Partitions();
 	}
 	int LineFromPosition(int pos);
-	int LineStart(int line) {
+	int LineStart(int line) const {
 		return starts.PositionFromPartition(line);
 	}
 
@@ -168,14 +168,14 @@ public:
 	~CellBuffer();
 
 	/// Retrieving positions outside the range of the buffer works and returns 0
-	char CharAt(int position);
+	char CharAt(int position) const;
 	void GetCharRange(char *buffer, int position, int lengthRetrieve);
 	char StyleAt(int position);
 
-	int Length();
+	int Length() const;
 	void Allocate(int newSize);
-	int Lines();
-	int LineStart(int line);
+	int Lines() const;
+	int LineStart(int line) const;
 	int LineFromPosition(int pos) { return lv.LineFromPosition(pos); }
 	const char *InsertString(int position, const char *s, int insertLength, bool &startSequence);