diff --git a/lib/Text/Regex/TDFA/Pattern.hs b/lib/Text/Regex/TDFA/Pattern.hs
index 066f1c7..40ab62b 100644
--- a/lib/Text/Regex/TDFA/Pattern.hs
+++ b/lib/Text/Regex/TDFA/Pattern.hs
@@ -201,7 +201,7 @@ decodeCharacterClass (PatternSetCharacterClass s) =
     "digit"  -> ['0'..'9']
     "punct"  -> ['\33'..'\47']++['\58'..'\64']++['\91'..'\96']++['\123'..'\126']
     "alpha"  -> ['A'..'Z']++['a'..'z']
-    "graph"  -> ['\41'..'\126']
+    "graph"  -> ['\33'..'\126']
     "space"  -> "\t\n\v\f\r "
     "blank"  -> "\t "
     "lower"  -> ['a'..'z']
diff --git a/test/cases/basic3.txt b/test/cases/basic3.txt
index 968c8ef..d2c8090 100644
--- a/test/cases/basic3.txt
+++ b/test/cases/basic3.txt
@@ -140,3 +140,6 @@
    144		.*(/000).*			/000			(0,4)(0,4)
    145		.*(\\000).*			\000			(0,4)(0,4)
    146		\\000				\000			(0,4)
+   147		[[:graph:]]+		!#}~		(0,4)
+   148		[[:xdigit:]]+		dE4db3eF		(0,8)
+   149		[[:print:]]+		!#}~		(0,4)