From 358cba6fa6f6b9f034b5c173cffdb0666358be51 Mon Sep 17 00:00:00 2001
From: clintval <valentine.clint@gmail.com>
Date: Tue, 24 Dec 2024 14:33:19 -0500
Subject: [PATCH] ...

---
 fgpyo/sam/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fgpyo/sam/__init__.py b/fgpyo/sam/__init__.py
index 29509f4..bc5d9fd 100644
--- a/fgpyo/sam/__init__.py
+++ b/fgpyo/sam/__init__.py
@@ -797,7 +797,7 @@ def isize(r1: AlignedSegment, r2: Optional[AlignedSegment] = None) -> int:
     if r2 is None:
         if not r1.has_tag("MC"):
             raise ValueError("Cannot infer insert size from a single read without a mate cigar!")
-        r2_cigar: Cigar = Cigar.from_cigarstring(r1.get_tag("MC"))
+        r2_cigar: Cigar = Cigar.from_cigarstring(cast(str, r1.get_tag("MC")))
         r2_is_forward: bool = r1.mate_is_forward
         r2_reference_start: int = r1.next_reference_start
     else: