diff --git a/src/main/java/com/github/rjeschke/txtmark/Line.java b/src/main/java/com/github/rjeschke/txtmark/Line.java
index 8d0e2bb..5403545 100644
--- a/src/main/java/com/github/rjeschke/txtmark/Line.java
+++ b/src/main/java/com/github/rjeschke/txtmark/Line.java
@@ -234,6 +234,8 @@ class Line
                 continue;
             if(c == ch)
                 count++;
+            else
+                break;
         }
         return count;
     }