diff --git a/checkpolicy/policy_scan.l b/checkpolicy/policy_scan.l
index e767b5f..143e797 100644
--- a/checkpolicy/policy_scan.l
+++ b/checkpolicy/policy_scan.l
@@ -234,7 +234,7 @@ HIGH				{ return(HIGH); }
 low |
 LOW				{ return(LOW); }
 "/"({alnum}|[_\.\-/])*	        { return(PATH); }
-\"({alnum}|[_\.\-\~])+\"	{ return(FILENAME); }
+\"({alnum}|[_\.\-\+\~])+\"	{ return(FILENAME); }
 {letter}({alnum}|[_\-])*([\.]?({alnum}|[_\-]))*	{ return(IDENTIFIER); }
 {alnum}*{letter}{alnum}*        { return(FILESYSTEM); }
 {digit}+|0x{hexval}+            { return(NUMBER); }