diff --git a/poky/meta/recipes-sato/webkit/webkitgtk/0001-gstreamer-add-a-missing-format-string.patch b/poky/meta/recipes-sato/webkit/webkitgtk/0001-gstreamer-add-a-missing-format-string.patch
new file mode 100644
index 0000000..bd4ac1e
--- /dev/null
+++ b/poky/meta/recipes-sato/webkit/webkitgtk/0001-gstreamer-add-a-missing-format-string.patch
@@ -0,0 +1,24 @@
+From 2d9687840b97186b80053dd262209e39455ac876 Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex.kanavin@gmail.com>
+Date: Wed, 8 May 2019 15:31:23 +0200
+Subject: [PATCH] gstreamer: add a missing format string
+
+Upstream-Status: Pending
+Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
+---
+ .../platform/graphics/gstreamer/WebKitWebSourceGStreamer.cpp    | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/Source/WebCore/platform/graphics/gstreamer/WebKitWebSourceGStreamer.cpp b/Source/WebCore/platform/graphics/gstreamer/WebKitWebSourceGStreamer.cpp
+index e1e497ee..483fd65c 100644
+--- a/Source/WebCore/platform/graphics/gstreamer/WebKitWebSourceGStreamer.cpp
++++ b/Source/WebCore/platform/graphics/gstreamer/WebKitWebSourceGStreamer.cpp
+@@ -738,7 +738,7 @@ static GstStateChangeReturn webKitWebSrcChangeState(GstElement* element, GstStat
+     WebKitWebSrc* src = WEBKIT_WEB_SRC(element);
+ 
+ #if GST_CHECK_VERSION(1, 14, 0)
+-    GST_DEBUG_OBJECT(src, gst_state_change_get_name(transition));
++    GST_DEBUG_OBJECT(src, "%s", gst_state_change_get_name(transition));
+ #endif
+     switch (transition) {
+     case GST_STATE_CHANGE_READY_TO_NULL: