diff --git a/tests/layout/test_flex.py b/tests/layout/test_flex.py
index 511bde633..6344b8f2a 100644
--- a/tests/layout/test_flex.py
+++ b/tests/layout/test_flex.py
@@ -576,3 +576,26 @@ def test_flex_percent_height_auto():
       <div class="a"">
         <div class="b"></div>
       </div>''')
+
+
+@assert_no_logs
+def test_flex_break_inside_avoid():
+    # Regression test for https://github.com/Kozea/WeasyPrint/issues/2183
+    page1, page2= render_pages('''
+      <style>
+        @font-face { src: url(weasyprint.otf); font-family: weasyprint }
+        @page { size: 6px 4px }
+        html { font-family: weasyprint; font-size: 2px }
+      </style>
+      <article style="display: flex; flex-wrap: wrap">
+        <div>ABC</div>
+        <div style="break-inside: avoid">abc def</div>
+      </article>''')
+    html, = page1.children
+    body, = html.children
+    article, = body.children
+    div, = article.children
+    html, = page2.children
+    body, = html.children
+    article, = body.children
+    div, = article.children
diff --git a/weasyprint/layout/flex.py b/weasyprint/layout/flex.py
index 5d3cef502..137906889 100644
--- a/weasyprint/layout/flex.py
+++ b/weasyprint/layout/flex.py
@@ -852,9 +852,12 @@ def flex_layout(context, box, bottom_space, skip_stack, containing_block,
                 if new_child is None:
                     if resume_at:
                         index, = resume_at
-                        if index:
-                            resume_at = {index + i - 1: None}
+                        index -= 1
+                    else:
+                        index = 0
+                    resume_at = {index + i: None}
                 else:
+                    page_is_empty = False
                     box.children.append(new_child)
                     if child_resume_at is not None:
                         if original_skip_stack: