diff --git a/bits/40_harb.js b/bits/40_harb.js
index 7faf509..c85de61 100644
--- a/bits/40_harb.js
+++ b/bits/40_harb.js
@@ -873,6 +873,7 @@ var PRN = (function() {
 			}
 			else sep = guess_sep(str.slice(0,1024));
 		}
+		else if(o && o.FS) sep = o.FS;
 		else sep = guess_sep(str.slice(0,1024));
 		var R = 0, C = 0, v = 0;
 		var start = 0, end = 0, sepcc = sep.charCodeAt(0), instr = false, cc=0, startcc=str.charCodeAt(0);
diff --git a/docbits/80_parseopts.md b/docbits/80_parseopts.md
index 30d969f..e9374c6 100644
--- a/docbits/80_parseopts.md
+++ b/docbits/80_parseopts.md
@@ -26,6 +26,7 @@ The exported `read` and `readFile` functions accept an options argument:
 |`sheets`     |         | If specified, only parse specified sheets **         |
 |`PRN`        | false   | If true, allow parsing of PRN files **               |
 |`xlfn`       | false   | If true, preserve `_xlfn.` prefixes in formulae **   |
+|`FS`         |         | DSV Field Separator override                         |
 
 - Even if `cellNF` is false, formatted text will be generated and saved to `.w`
 - In some cases, sheets may be parsed even if `bookSheets` is false.
diff --git a/types/index.d.ts b/types/index.d.ts
index c282c2d..f4a0588 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -163,6 +163,9 @@ export interface ParsingOptions extends CommonOptions {
     /** Override default date format (code 14) */
     dateNF?: string;
 
+    /** Field Separator ("Delimiter" override) */
+    FS?: string;
+
     /**
      * If >0, read the first sheetRows rows
      * @default 0