diff --git a/pdfplumber/utils.py b/pdfplumber/utils.py
index 74eaff73..e76eeb86 100644
--- a/pdfplumber/utils.py
+++ b/pdfplumber/utils.py
@@ -460,6 +460,7 @@ def obj_to_edges(obj):
     return {
         "line": lambda x: [ line_to_edge(x) ],
         "rect": rect_to_edges,
+        "rect_edge": rect_to_edges,
         "curve": curve_to_edges,
     }[obj["object_type"]](obj)
 
diff --git a/tests/test-issues.py b/tests/test-issues.py
index 490275fe..55b1a762 100644
--- a/tests/test-issues.py
+++ b/tests/test-issues.py
@@ -135,6 +135,11 @@ def test_pr_138(self):
         with pdfplumber.open(path) as pdf:
             page = pdf.pages[0]
             assert len(page.chars) == 5140
+            page.extract_tables({
+                "vertical_strategy": "explicit",
+                "horizontal_strategy": "lines",
+                "explicit_vertical_lines": page.curves + page.edges,
+            })
 
     def test_issue_140(self):
         path = os.path.join(HERE, "pdfs/issue-140-example.pdf")