diff --git a/darwin/drawtext.m b/darwin/drawtext.m
index e5f0d12e..fd5a5bbb 100644
--- a/darwin/drawtext.m
+++ b/darwin/drawtext.m
@@ -5,6 +5,7 @@
 // TODO on an empty string nLines == 0
 // we must prevent this somehow
 // TODO in general, every function could be more robust, but we cannot have a situation where there are zero lines
+// TODO what happens to extents if only whitespace?
 
 struct uiDrawTextLayout {
 	CFAttributedStringRef attrstr;
diff --git a/unix/drawtext.c b/unix/drawtext.c
index 842b70dd..6acb848a 100644
--- a/unix/drawtext.c
+++ b/unix/drawtext.c
@@ -5,6 +5,7 @@
 // TODO
 // - if the RTL override is at the beginning of a line, the preceding space is included?
 // - nLines == 0: mostly works, except the width is wrong if the paragraph alignment is center or right...
+// - TODO check whitespace and line bounds
 
 struct uiDrawTextLayout {
 	PangoLayout *layout;