diff --git a/addressbook/crm.php b/addressbook/crm.php
index 4a453c8b90..54831d61e9 100644
--- a/addressbook/crm.php
+++ b/addressbook/crm.php
@@ -70,6 +70,12 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET')
 		die("Missing 'from' GET parameter\n");
 	}
 	$from = $_GET['from'];
+
+	// fix missing url-encoding of +49...
+	if (preg_match('/^ [\d]+/', $from))
+	{
+		$from[0] = '+';
+	}
 }
 else
 {
@@ -89,4 +95,4 @@ try {
 catch (\Exception $e) {
 	error_log("crm.php: No contact for from=$from found!");
 	die("No contact for from=$from found!\n");
-}
+}
\ No newline at end of file