diff --git a/src/showdown.js b/src/showdown.js
index 25bed63..0505fb0 100644
--- a/src/showdown.js
+++ b/src/showdown.js
@@ -222,6 +222,7 @@ Showdown.converter = function (converter_options) {
 
         // Iterate over each plugin
         Showdown.forEach(converter_options.extensions, function (plugin) {
+            var pluginName = plugin;
 
             // Assume it's a bundled plugin if a string is given
             if (typeof plugin === 'string') {
@@ -244,7 +245,7 @@ Showdown.converter = function (converter_options) {
                     }
                 });
             } else {
-                throw "Extension '" + plugin + "' could not be loaded.  It was either not found or is not a valid extension.";
+                throw "Extension '" + pluginName + "' could not be loaded.  It was either not found or is not a valid extension.";
             }
         });
     }
diff --git a/test/issues/#150.hyphens are getting removed.html b/test/issues/#150.hyphens are getting removed.html
new file mode 100644
index 0000000..8f9d2e5
--- /dev/null
+++ b/test/issues/#150.hyphens are getting removed.html	
@@ -0,0 +1 @@
+<p>2015-10-04</p>
\ No newline at end of file
diff --git a/test/issues/#150.hyphens are getting removed.md b/test/issues/#150.hyphens are getting removed.md
new file mode 100644
index 0000000..d0d6dda
--- /dev/null
+++ b/test/issues/#150.hyphens are getting removed.md	
@@ -0,0 +1 @@
+2015-10-04
diff --git a/test/run.js b/test/run.js
index e6f59c0..66d87d9 100644
--- a/test/run.js
+++ b/test/run.js
@@ -54,6 +54,7 @@ var runTestsInDir = function(dir, converter) {
 describe('Markdown', function() {
     var converter = new showdown.converter();
     runTestsInDir('test/cases', converter);
+    runTestsInDir('test/issues', converter);
 });