diff --git a/markdown.php b/markdown.php
index aa49295..7997542 100644
--- a/markdown.php
+++ b/markdown.php
@@ -94,22 +94,22 @@ class markdown
     // TITLES
     // Titles ATX (Optionnal sharp at the end)
     // ###### Title6
-    $search[] = "/^###### (.+)(#*)$/Um";
+    $search[] = "/^###### (.+)( +#*)$/Um";
     $replace[] = "</p>\n<h6>\\1</h6>\n<p>";
     // ##### Title5
-    $search[] = "/^##### (.+)(#*)$/Um";
+    $search[] = "/^##### (.+)( +#*)$/Um";
     $replace[] = "</p>\n<h5>\\1</h5>\n<p>";
     // #### Title4
-    $search[] = "/^#### (.+)(#*)$/Um";
+    $search[] = "/^#### (.+)( +#*)$/Um";
     $replace[] = "</p>\n<h4>\\1</h4>\n<p>";
     // ### Title3
-    $search[] = "/^### (.+)(#*)$/Um";
+    $search[] = "/^### (.+)( +#*)$/Um";
     $replace[] = "</p>\n<h3>\\1</h3>\n<p>";
     // ## Title2
-    $search[] = "/^## (.+)(#*)$/Um";
+    $search[] = "/^## (.+)( +#*)$/Um";
     $replace[] = "</p>\n<h2>\\1</h2>\n<p>";
     // # Title1
-    $search[] = "/^# (.+)(#*)$/Um";
+    $search[] = "/^# (.+)( +#*)$/Um";
     $replace[] = "</p>\n<h1>\\1</h1>\n<p>";
     // End of line with double space : <br/>
     $search[] = "/(  )$/Um";               $replace[] = "<br/>";