diff --git a/ShellCheck/Analytics.hs b/ShellCheck/Analytics.hs
index 7e5b2da..5724bd5 100644
--- a/ShellCheck/Analytics.hs
+++ b/ShellCheck/Analytics.hs
@@ -33,6 +33,7 @@ checks = concat [
     ,[subshellAssignmentCheck]
     ,[checkSpacefulness]
     ,[checkUnquotedExpansions]
+    ,[checkShebang]
     ]
 
 runAllAnalytics = checkList checks
@@ -223,6 +224,14 @@ bracedString l = concat $ deadSimple l
 isMagicInQuotes (T_DollarBraced _ l) | '@' `elem` (bracedString l) = True
 isMagicInQuotes _ = False
 
+prop_checkShebang1 = verifyFull checkShebang "#!/usr/bin/env bash -x\necho cow"
+prop_checkShebang2 = verifyNotFull checkShebang "#! /bin/sh  -l "
+checkShebang (T_Script id sb _) m =
+    if (length $ words sb) > 2 then 
+        let note = Note ErrorC $ "On most OS, shebangs can only specify a single parameter."
+        in Map.adjust (\(Metadata pos notes) -> Metadata pos (note:notes)) id m
+    else m
+
 prop_checkForInQuoted = verify checkForInQuoted "for f in \"$(ls)\"; do echo foo; done"
 prop_checkForInQuoted2 = verifyNot checkForInQuoted "for f in \"$@\"; do echo foo; done"
 prop_checkForInQuoted3 = verify checkForInQuoted "for f in 'find /'; do true; done"
diff --git a/ShellCheck/Parser.hs b/ShellCheck/Parser.hs
index 18ffe76..dcd5776 100644
--- a/ShellCheck/Parser.hs
+++ b/ShellCheck/Parser.hs
@@ -1338,8 +1338,8 @@ wtf = do
 readShebang = do
     try $ string "#!"
     str <- anyChar `reluctantlyTill` oneOf "\r\n"
-    optional $ carriageReturn
-    linefeed
+    optional carriageReturn
+    optional linefeed
     return str
 
 readScript = do