diff --git a/README.md b/README.md
index 53ba21a..c49f748 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,6 @@ TODO
 * Make VM and transformMultiplyLoops use a Proxied object that gives out 0
   for nonexistent elements for tape and allows using [] interface
 * Keep a cache of compiled programs in `ircbotRun()`
-* Replace non-IRC low bytes with their U+2400 versions in `ircbotRun()`
 * Support for other types of EOF?
 
 ### gir.html
diff --git a/gir.js b/gir.js
index 80893c5..5662a83 100644
--- a/gir.js
+++ b/gir.js
@@ -937,6 +937,18 @@ function ircbotRun(program, input, maxCycles = 400000) {
 	let result = runVM(vm, maxCycles);
 	let output = decodeUTF8(result.state.output);
 
+	// Replace all characters < 0x20 except for IRC formatting codes
+	// with their graphical representations at U+24xx
+	let formattingChars = [0x02, 0x03, 0x0f, 0x12, 0x15];
+	output = Array.from(output).map(c => {
+		let codePoint = c.codePointAt(0);
+		if(codePoint < 0x20 && !formattingChars.includes(codePoint)) {
+			return String.fromCodePoint(0x2400 + codePoint);
+		} else {
+			return c;
+		}
+	}).join('');
+
 	// Did we run into maxCycles?
 	let executedTooLong = maxCycles != null &&
 		result.cycles >= maxCycles;