1 files changed, 1 insertions, 0 deletions
diff --git a/comment.go b/comment.go
index 28140bf..8414b40 100644
--- a/comment.go
+++ b/comment.go
@@ -109,6 +109,7 @@ func (f *File) AddComment(sheet, cell, format string) error {
 		sheetRels := "xl/worksheets/_rels/" + strings.TrimPrefix(f.sheetMap[trimSheetName(sheet)], "xl/worksheets/") + ".rels"
 		rID := f.addRels(sheetRels, SourceRelationshipDrawingVML, sheetRelationshipsDrawingVML, "")
 		f.addRels(sheetRels, SourceRelationshipComments, sheetRelationshipsComments, "")
+		f.addSheetNameSpace(sheet, SourceRelationship)
 		f.addSheetLegacyDrawing(sheet, rID)
 	}
 	commentsXML := "xl/comments" + strconv.Itoa(commentID) + ".xml"