diff --git a/src/core/network-openssl.c b/src/core/network-openssl.c
index 92507e14..9956f217 100644
--- a/src/core/network-openssl.c
+++ b/src/core/network-openssl.c
@@ -226,7 +226,7 @@ static gboolean irssi_ssl_verify_hostname(X509 *cert, const char *hostname)
 		} else {
 			g_warning("No subjectAltNames and no valid common name in certificate");
 		}
-		free(cert_subject_cn);
+		g_free(cert_subject_cn);
 	}
 
 	return matched;