diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,11 @@
+## 1.4.12
+
+* Don't show source location for logs that don't have that information [#1027](https://github.com/yesodweb/yesod/pull/1027)
+
+## 1.4.11
+
+* Expose `stripHandlerT` and `subHelper`
+
 ## 1.4.10
 
 * Export log formatting [#1001](https://github.com/yesodweb/yesod/pull/1001)
diff --git a/Yesod/Core/Class/Yesod.hs b/Yesod/Core/Class/Yesod.hs
--- a/Yesod/Core/Class/Yesod.hs
+++ b/Yesod/Core/Class/Yesod.hs
@@ -615,7 +615,14 @@
                     Nothing -> Nothing
                     Just j -> Just $ jelper j
 
--- | Default formatting for log messages.
+-- | Default formatting for log messages. When you use
+-- the template haskell logging functions for to log with information
+-- about the source location, that information will be appended to 
+-- the end of the log. When you use the non-TH logging functions, 
+-- like 'logDebugN', this function does not include source 
+-- information. This currently works by checking to see if the
+-- package name is the string \"\<unknown\>\". This is a hack,
+-- but it removes some of the visual clutter from non-TH logs.
 --
 -- Since 1.4.10
 formatLogMessage :: IO ZonedDate
@@ -626,20 +633,24 @@
                  -> IO LogStr
 formatLogMessage getdate loc src level msg = do
     now <- getdate
-    return $
-        toLogStr now `mappend`
-        " [" `mappend`
-        (case level of
+    return $ mempty
+        `mappend` toLogStr now 
+        `mappend` " [" 
+        `mappend` (case level of
             LevelOther t -> toLogStr t
-            _ -> toLogStr $ drop 5 $ show level) `mappend`
-        (if T.null src
+            _ -> toLogStr $ drop 5 $ show level) 
+        `mappend` (if T.null src
             then mempty
-            else "#" `mappend` toLogStr src) `mappend`
-        "] " `mappend`
-        msg `mappend`
-        " @(" `mappend`
-        toLogStr (fileLocationToString loc) `mappend`
-        ")\n"
+            else "#" `mappend` toLogStr src) 
+        `mappend` "] " 
+        `mappend` msg 
+        `mappend` sourceSuffix
+        `mappend` "\n"
+    where 
+    sourceSuffix = if loc_package loc == "<unknown>" then "" else mempty
+        `mappend` " @(" 
+        `mappend` toLogStr (fileLocationToString loc) 
+        `mappend` ")"
 
 -- | Customize the cookies used by the session backend.  You may
 -- use this function on your definition of 'makeSessionBackend'.
diff --git a/yesod-core.cabal b/yesod-core.cabal
--- a/yesod-core.cabal
+++ b/yesod-core.cabal
@@ -1,5 +1,5 @@
 name:            yesod-core
-version:         1.4.11
+version:         1.4.11.1
 license:         MIT
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>
@@ -47,7 +47,7 @@
                    , case-insensitive      >= 0.2
                    , parsec                >= 2        && < 3.2
                    , directory             >= 1
-                   , vector                >= 0.9      && < 0.11
+                   , vector                >= 0.9      && < 0.12
                    , aeson                 >= 0.5
                    , fast-logger           >= 2.2
                    , wai-logger            >= 0.2