diff --git a/weasyprint/layout/inlines.py b/weasyprint/layout/inlines.py
index 29487c9f..52a7b034 100644
--- a/weasyprint/layout/inlines.py
+++ b/weasyprint/layout/inlines.py
@@ -733,7 +733,7 @@ def split_text_box(context, box, available_width, line_width, skip):
                 'Expected nothing or a preserved line break' % (between,))
         resume_at += skip
 
-    if box and not preserved_line_break and not new_text.strip():
+    if box and not preserved_line_break and not new_text.strip(' '):
         box.width = 0
 
     return box, resume_at, preserved_line_break