diff --git a/lib/Sabberworm/CSS/Parsing/ParserState.php b/lib/Sabberworm/CSS/Parsing/ParserState.php
index ad79820a6..daf4919ce 100644
--- a/lib/Sabberworm/CSS/Parsing/ParserState.php
+++ b/lib/Sabberworm/CSS/Parsing/ParserState.php
@@ -55,7 +55,11 @@ public function parseIdentifier($bIgnoreCase = true) {
 		}
 		$sCharacter = null;
 		while (($sCharacter = $this->parseCharacter(true)) !== null) {
-			$sResult .= $sCharacter;
+			if (preg_match('/[a-zA-Z0-9\x{00A0}-\x{FFFF}_-]/Sux', $sCharacter)) {
+				$sResult .= $sCharacter;
+			} else {
+				$sResult .= '\\' . $sCharacter;
+			}
 		}
 		if ($bIgnoreCase) {
 			$sResult = $this->strtolower($sResult);
diff --git a/tests/Sabberworm/CSS/ParserTest.php b/tests/Sabberworm/CSS/ParserTest.php
index ea34f2e70..3f5b279de 100644
--- a/tests/Sabberworm/CSS/ParserTest.php
+++ b/tests/Sabberworm/CSS/ParserTest.php
@@ -466,6 +466,12 @@ function testSelectorEscapesInFile() {
 		$this->assertSame($sExpected, $oDoc->render());
 	}
 
+	function testIdentifierEscapesInFile() {
+		$oDoc = $this->parsedStructureForFile('identifier-escapes', Settings::create()->withMultibyteSupport(true));
+		$sExpected = 'div {font: 14px Font Awesome\ 5 Pro;font: 14px Font Awesome\} 5 Pro;font: 14px Font Awesome\; 5 Pro;f\;ont: 14px Font Awesome\; 5 Pro;}';
+		$this->assertSame($sExpected, $oDoc->render());
+	}
+
 	function testSelectorIgnoresInFile() {
 		$oDoc = $this->parsedStructureForFile('selector-ignores', Settings::create()->withMultibyteSupport(true));
 		$sExpected = '.some[selectors-may=\'contain-a-{\'] {}
diff --git a/tests/files/identifier-escapes.css b/tests/files/identifier-escapes.css
new file mode 100644
index 000000000..8829e7a82
--- /dev/null
+++ b/tests/files/identifier-escapes.css
@@ -0,0 +1,6 @@
+div {
+  font: 14px Font Awesome\ 5 Pro;
+  font: 14px Font Awesome\} 5 Pro;
+  font: 14px Font Awesome\; 5 Pro;
+  f\;ont: 14px Font Awesome\; 5 Pro;
+}