diff --git a/css.escape.js b/css.escape.js
index 60edc3a..49499c1 100644
--- a/css.escape.js
+++ b/css.escape.js
@@ -27,10 +27,10 @@
 				}
 
 				if (
-					// If the character is in the range [\1-\1F] (U+0001 to U+001F) or
-					// [\7F-\9F] (U+007F to U+009F), […]
+					// If the character is in the range [\1-\1F] (U+0001 to U+001F) or is
+					// U+007F, […]
 					(codeUnit >= 0x0001 && codeUnit <= 0x001F) ||
-					(codeUnit >= 0x007F && codeUnit <= 0x009F) ||
+					codeUnit == 0x007F ||
 					// If the character is the first character and is in the range [0-9]
 					// (U+0030 to U+0039), […]
 					(index == 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) ||
diff --git a/tests/tests.js b/tests/tests.js
index 96cd534..0220b78 100644
--- a/tests/tests.js
+++ b/tests/tests.js
@@ -54,7 +54,8 @@ assertEquals(CSS.escape('-9a'), '-\\39 a');
 
 assertEquals(CSS.escape('--a'), '-\\-a');
 
-assertEquals(CSS.escape('\x80\x2D\x5F\xA9'), '\\80 \x2D\x5F\xA9');
+assertEquals(CSS.escape('\x80\x2D\x5F\xA9'), '\x80\x2D\x5F\xA9');
+assertEquals(CSS.escape('\x7F\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8A\x8B\x8C\x8D\x8E\x8F\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9A\x9B\x9C\x9D\x9E\x9F'), '\\7f \x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8A\x8B\x8C\x8D\x8E\x8F\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9A\x9B\x9C\x9D\x9E\x9F');
 assertEquals(CSS.escape('\xA0\xA1\xA2'), '\xA0\xA1\xA2');
 assertEquals(CSS.escape('a0123456789b'), 'a0123456789b');
 assertEquals(CSS.escape('abcdefghijklmnopqrstuvwxyz'), 'abcdefghijklmnopqrstuvwxyz');