diff --git a/src/uu/csplit/src/patterns.rs b/src/uu/csplit/src/patterns.rs
index b49d1c606..9326ea379 100644
--- a/src/uu/csplit/src/patterns.rs
+++ b/src/uu/csplit/src/patterns.rs
@@ -106,7 +106,7 @@ pub fn get_patterns(args: &[String]) -> Result<Vec<Pattern>, CsplitError> {
 fn extract_patterns(args: &[String]) -> Result<Vec<Pattern>, CsplitError> {
     let mut patterns = Vec::with_capacity(args.len());
     let to_match_reg =
-        Regex::new(r"^(/(?P<UPTO>.+)/|%(?P<SKIPTO>.+)%)(?P<OFFSET>[\+-]?\d+)?$").unwrap();
+        Regex::new(r"^(/(?P<UPTO>.+)/|%(?P<SKIPTO>.+)%)(?P<OFFSET>[\+-]?[0-9]+)?$").unwrap();
     let execute_ntimes_reg = Regex::new(r"^\{(?P<TIMES>[0-9]+)|\*\}$").unwrap();
     let mut iter = args.iter().peekable();
 
diff --git a/tests/by-util/test_csplit.rs b/tests/by-util/test_csplit.rs
index 2a94c10bf..96322e444 100644
--- a/tests/by-util/test_csplit.rs
+++ b/tests/by-util/test_csplit.rs
@@ -176,6 +176,15 @@ fn test_up_to_match_offset_repeat_twice() {
     assert_eq!(at.read("xx03"), generate(32, 51));
 }
 
+#[test]
+fn test_up_to_match_non_ascii_offset() {
+    // we use a different error message than GNU
+    new_ucmd!()
+        .args(&["numbers50.txt", "/9$/𝟚"])
+        .fails()
+        .stderr_contains("invalid pattern");
+}
+
 #[test]
 fn test_up_to_match_negative_offset() {
     let (at, mut ucmd) = at_and_ucmd!();