diff --git a/src/ShellCheck/Data.hs b/src/ShellCheck/Data.hs
index 3000a99..a145684 100644
--- a/src/ShellCheck/Data.hs
+++ b/src/ShellCheck/Data.hs
@@ -167,6 +167,7 @@ shellForExecutable name =
         "ksh"   -> return Ksh
         "ksh88" -> return Ksh
         "ksh93" -> return Ksh
+        "oksh"  -> return Ksh
         _ -> Nothing
 
 flagsForRead = "sreu:n:N:i:p:a:t:"
diff --git a/src/ShellCheck/Parser.hs b/src/ShellCheck/Parser.hs
index 9628b2e..d019d89 100644
--- a/src/ShellCheck/Parser.hs
+++ b/src/ShellCheck/Parser.hs
@@ -3387,7 +3387,8 @@ readScriptFile sourced = do
         "busybox sh",
         "bash",
         "bats",
-        "ksh"
+        "ksh",
+        "oksh"
         ]
     badShells = [
         "awk",