diff --git a/js/handlers.js b/js/handlers.js
index 0b3ea2f..c1b3228 100644
--- a/js/handlers.js
+++ b/js/handlers.js
@@ -41,7 +41,7 @@ weechat.factory('handlers', ['$rootScope', '$log', 'models', 'plugins', 'notific
     };
 
     // inject a fake buffer line for date change if needed
-    var injectDateChangeMessageIfNeeded = function(buffer, old_date, new_date) {
+    var injectDateChangeMessageIfNeeded = function(buffer, manually, old_date, new_date) {
         if (buffer.bufferType === 1) {
             // Don't add date change messages to free buffers
             return;
@@ -50,7 +50,12 @@ weechat.factory('handlers', ['$rootScope', '$log', 'models', 'plugins', 'notific
         new_date.setHours(0, 0, 0, 0);
         // Check if the date changed
         if (old_date.valueOf() !== new_date.valueOf()) {
-            ++buffer.lastSeen;
+            if (manually) {
+                // if the message that caused this date change to be sent
+                // would increment buffer.lastSeen, we should increment as
+                // well.
+                ++buffer.lastSeen;
+            }
             var old_date_plus_one = old_date;
             old_date_plus_one.setDate(old_date.getDate() + 1);
             // it's not always true that a date with time 00:00:00
@@ -141,7 +146,7 @@ weechat.factory('handlers', ['$rootScope', '$log', 'models', 'plugins', 'notific
             if (buffer.lines.length > 0) {
                 var old_date = new Date(buffer.lines[buffer.lines.length - 1].date),
                     new_date = new Date(message.date);
-                injectDateChangeMessageIfNeeded(buffer, old_date, new_date);
+                injectDateChangeMessageIfNeeded(buffer, manually, old_date, new_date);
             }
 
             message = plugins.PluginManager.contentForMessage(message);
@@ -326,7 +331,7 @@ weechat.factory('handlers', ['$rootScope', '$log', 'models', 'plugins', 'notific
             var buffer = models.getBuffer(last_line.buffer);
             if (buffer.lines.length > 0) {
                 var last_date = new Date(buffer.lines[buffer.lines.length - 1].date);
-                injectDateChangeMessageIfNeeded(buffer, last_date, new Date());
+                injectDateChangeMessageIfNeeded(buffer, true, last_date, new Date());
             }
         }
     };