diff --git a/src/uu/cksum/src/cksum.rs b/src/uu/cksum/src/cksum.rs
index 554fe8514..9268a40bb 100644
--- a/src/uu/cksum/src/cksum.rs
+++ b/src/uu/cksum/src/cksum.rs
@@ -436,7 +436,7 @@ where
     // 1. <algo>[-<bits>] (<filename>) = <checksum>
     //    algo must be uppercase or b (for blake2b)
     // 2. <checksum> [* ]<filename>
-    let regex_pattern = r"^\s*\\?(?P<algo>[A-Z0-9b]+)(-(?P<bits>\d+))?\s?\((?P<filename1>.*)\) = (?P<checksum1>[a-fA-F0-9]+)$|^(?P<checksum2>[a-fA-F0-9]+)\s[* ](?P<filename2>.*)";
+    let regex_pattern = r"^\s*\\?(?P<algo>(?:[A-Z0-9]+|BLAKE2b))(?:-(?P<bits>\d+))?\s?\((?P<filename1>.*)\) = (?P<checksum1>[a-fA-F0-9]+)$|^(?P<checksum2>[a-fA-F0-9]+)\s[* ](?P<filename2>.*)";
     let re = Regex::new(regex_pattern).unwrap();
 
     // if cksum has several input files, it will print the result for each file
diff --git a/tests/by-util/test_cksum.rs b/tests/by-util/test_cksum.rs
index 2bfe1b3b8..19ea2badd 100644
--- a/tests/by-util/test_cksum.rs
+++ b/tests/by-util/test_cksum.rs
@@ -1119,6 +1119,28 @@ fn test_blake2b_bits() {
         .stderr_contains("f: no properly formatted checksum lines found");
 }
 
+#[test]
+fn test_bsd_case() {
+    let scene = TestScenario::new(util_name!());
+    let at = &scene.fixtures;
+    at.write("f", "bSD (README.md) = 0000\n");
+
+    scene
+        .ucmd()
+        .arg("-c")
+        .arg("f")
+        .fails()
+        .stderr_contains("f: no properly formatted checksum lines found");
+    at.write("f", "BsD (README.md) = 0000\n");
+
+    scene
+        .ucmd()
+        .arg("-c")
+        .arg("f")
+        .fails()
+        .stderr_contains("f: no properly formatted checksum lines found");
+}
+
 #[ignore = "Different output"]
 #[test]
 fn test_blake2d_tested_with_sha1() {