diff --git a/Parsedown.php b/Parsedown.php
index 3a6ee44..9bdae22 100755
--- a/Parsedown.php
+++ b/Parsedown.php
@@ -1197,7 +1197,7 @@ class Parsedown
             return;
         }
 
-        if (preg_match('/^[(]((?:[^ ()]|[(][^ )]+[)])+)(?:[ ]+("[^"]+"|\'[^\']+\'))?[)]/', $remainder, $matches))
+        if (preg_match('/^[(]((?:[^ ()]|[(][^ )]+[)])+)(?:[ ]+("[^"]*"|\'[^\']*\'))?[)]/', $remainder, $matches))
         {
             $Element['attributes']['href'] = $matches[1];
 
diff --git a/test/data/image_title.html b/test/data/image_title.html
index 4fc59f6..957c950 100644
--- a/test/data/image_title.html
+++ b/test/data/image_title.html
@@ -1 +1,2 @@
-<p><img src="/md.png" alt="alt" title="title" /></p>
\ No newline at end of file
+<p><img src="/md.png" alt="alt" title="title" /></p>
+<p><img src="/md.png" alt="blank title" title="" /></p>
\ No newline at end of file
diff --git a/test/data/image_title.md b/test/data/image_title.md
index 3e58ee5..7ce2849 100644
--- a/test/data/image_title.md
+++ b/test/data/image_title.md
@@ -1 +1,3 @@
-![alt](/md.png "title")
\ No newline at end of file
+![alt](/md.png "title")
+
+![blank title](/md.png "")
\ No newline at end of file
diff --git a/test/data/inline_link_title.html b/test/data/inline_link_title.html
index 22cf309..ecdfd03 100644
--- a/test/data/inline_link_title.html
+++ b/test/data/inline_link_title.html
@@ -1,4 +1,6 @@
 <p><a href="http://example.com" title="Title">single quotes</a></p>
 <p><a href="http://example.com" title="Title">double quotes</a></p>
+<p><a href="http://example.com" title="">single quotes blank</a></p>
+<p><a href="http://example.com" title="">double quotes blank</a></p>
 <p><a href="http://example.com" title="2 Words">space</a></p>
 <p><a href="http://example.com/url-(parentheses)" title="Title">parentheses</a></p>
\ No newline at end of file
diff --git a/test/data/inline_link_title.md b/test/data/inline_link_title.md
index d756af1..6e1c5af 100644
--- a/test/data/inline_link_title.md
+++ b/test/data/inline_link_title.md
@@ -2,6 +2,10 @@
 
 [double quotes](http://example.com "Title")
 
+[single quotes blank](http://example.com '')
+
+[double quotes blank](http://example.com "")
+
 [space](http://example.com "2 Words")
 
 [parentheses](http://example.com/url-(parentheses) "Title")
\ No newline at end of file