1 files changed, 1 insertions, 1 deletions
diff --git a/src/pr.c b/src/pr.c
index 20e863760..26f221f99 100644
--- a/src/pr.c
+++ b/src/pr.c
@@ -1233,7 +1233,7 @@ init_parameters (int number_of_files)
         }
       /* It's rather pointless to define a TAB separator with column
          alignment */
-      else if (!join_lines && *col_sep_string == '\t')
+      else if (!join_lines && col_sep_length == 1 && *col_sep_string == '\t')
         col_sep_string = column_separator;
 
       truncate_lines = true;