diff --git a/lib/Unirest/Unirest.php b/lib/Unirest/Unirest.php
index db59943..5b12841 100644
--- a/lib/Unirest/Unirest.php
+++ b/lib/Unirest/Unirest.php
@@ -133,6 +133,10 @@ class Unirest
 			// Encode and build query based on RFC 1738
 			$query = '?'.http_build_query($query_parsed);
 		}
+		
+		// Handle port seperator
+		if ($port && $port[0] != ":")
+			$port = ":" . $port;
 
 		// Return the completed URL
 		$result = $scheme . $host . $port . $path . $query;
@@ -182,4 +186,4 @@ function is_hex($hex) {
     if (empty($hex)) { $hex = 0; }; 
     $dec = hexdec($hex); 
     return ($hex == dechex($dec)); 
-}
\ No newline at end of file
+}