diff --git a/MatrixConnection.php b/MatrixConnection.php
index 8f59b84..f0d8aff 100644
--- a/MatrixConnection.php
+++ b/MatrixConnection.php
@@ -36,7 +36,7 @@ class MatrixConnection
 		curl_setopt($handle, CURLOPT_POSTFIELDS, json_encode($send_message));
 		curl_setopt($handle, CURLOPT_HTTPHEADER, array("Content-Type: application/json"));
 
-		$response = exec_curl_request($handle);
+		$response = $this->exec_curl_request($handle);
 		return isset($response["event_id"]);
 	}
 
@@ -60,7 +60,7 @@ class MatrixConnection
 		curl_setopt($handle, CURLOPT_TIMEOUT, 60);
 		curl_setopt($handle, CURLOPT_HTTPHEADER, array("Content-Type: application/json"));
 
-		$res = exec_curl_request($handle);
+		$res = $this->exec_curl_request($handle);
 		return !(isset($res["errcode"]) && $res["errcode"] == "M_UNKNOWN");
 	}
 
@@ -87,7 +87,7 @@ class MatrixConnection
 		curl_setopt($handle, CURLOPT_HTTPHEADER, array("Content-Type: application/json"));
 		curl_setopt($handle, CURLOPT_POSTFIELDS, json_encode($data));
 
-		return exec_curl_request($handle);
+		return $this->exec_curl_request($handle);
 	}
 
 	function exec_curl_request($handle)