diff --git a/client/Wayland/wlfreerdp.c b/client/Wayland/wlfreerdp.c
index 3007d4163..c77d16389 100644
--- a/client/Wayland/wlfreerdp.c
+++ b/client/Wayland/wlfreerdp.c
@@ -191,6 +191,9 @@ static BOOL wl_pre_connect(freerdp* instance)
 	settings = instance->context->settings;
 	WINPR_ASSERT(settings);
 
+	if (!freerdp_settings_set_bool(settings, FreeRDP_CertificateCallbackPreferPEM, TRUE))
+		return FALSE;
+
 	if (!freerdp_settings_set_uint32(settings, FreeRDP_OsMajorType, OSMAJORTYPE_UNIX))
 		return FALSE;
 	if (!freerdp_settings_set_uint32(settings, FreeRDP_OsMinorType, OSMINORTYPE_NATIVE_WAYLAND))