diff --git a/lib/regexp_parser/scanner/property.rl b/lib/regexp_parser/scanner/property.rl
index 64edb63..822d035 100644
--- a/lib/regexp_parser/scanner/property.rl
+++ b/lib/regexp_parser/scanner/property.rl
@@ -17,7 +17,7 @@
       text = copy(data, ts-1, te)
       type = (text[1] == 'P') ^ (text[3] == '^') ? :nonproperty : :property
 
-      name = data[ts+2..te-2].pack('c*').gsub(/[\^\s_\-]/, '').downcase
+      name = text[3..-2].gsub(/[\^\s_\-]/, '').downcase
 
       token = self.class.short_prop_map[name] || self.class.long_prop_map[name]
       validation_error(:property, name) unless token