diff --git a/README.md b/README.md
index d29b324..c386436 100644
--- a/README.md
+++ b/README.md
@@ -240,18 +240,18 @@ Get the current directory
 `open_float(dir)` \
 Open oil browser in a floating window
 
-| Param | Type          | Desc                                                        |
-| ----- | ------------- | ----------------------------------------------------------- |
-| dir   | `nil\|string` | When nil, open the parent of the current buffer, or the cwd |
+| Param | Type          | Desc                                                                                        |
+| ----- | ------------- | ------------------------------------------------------------------------------------------- |
+| dir   | `nil\|string` | When nil, open the parent of the current buffer, or the cwd if current buffer is not a file |
 
 ### open(dir)
 
 `open(dir)` \
 Open oil browser for a directory
 
-| Param | Type          | Desc                                                        |
-| ----- | ------------- | ----------------------------------------------------------- |
-| dir   | `nil\|string` | When nil, open the parent of the current buffer, or the cwd |
+| Param | Type          | Desc                                                                                        |
+| ----- | ------------- | ------------------------------------------------------------------------------------------- |
+| dir   | `nil\|string` | When nil, open the parent of the current buffer, or the cwd if current buffer is not a file |
 
 ### close()
 
diff --git a/doc/oil.txt b/doc/oil.txt
index 09c663f..ab6f145 100644
--- a/doc/oil.txt
+++ b/doc/oil.txt
@@ -114,14 +114,14 @@ open_float({dir})                                                 *oil.open_floa
 
     Parameters:
       {dir} `nil|string` When nil, open the parent of the current buffer, or the
-            cwd
+            cwd if current buffer is not a file
 
 open({dir})                                                             *oil.open*
     Open oil browser for a directory
 
     Parameters:
       {dir} `nil|string` When nil, open the parent of the current buffer, or the
-            cwd
+            cwd if current buffer is not a file
 
 close()                                                                *oil.close*
     Restore the buffer that was present when oil was opened