diff --git a/protocol/wayland.xml b/protocol/wayland.xml
index c32bc8b6..5118b5ba 100644
--- a/protocol/wayland.xml
+++ b/protocol/wayland.xml
@@ -165,7 +165,7 @@
       <arg name="fd" type="fd"/>
       <arg name="width" type="int"/>
       <arg name="height" type="int"/>
-      <arg name="stride" type="uint"/>
+      <arg name="stride" type="int"/>
       <arg name="format" type="uint"/>
     </request>
 
diff --git a/src/wayland-shm.c b/src/wayland-shm.c
index bfa4aa8f..a1ad0f73 100644
--- a/src/wayland-shm.c
+++ b/src/wayland-shm.c
@@ -93,7 +93,7 @@ wl_shm_buffer_init(struct wl_client *client, uint32_t id,
 static void
 shm_create_buffer(struct wl_client *client, struct wl_resource *resource,
 		  uint32_t id, int fd, int32_t width, int32_t height,
-		  uint32_t stride, uint32_t format)
+		  int32_t stride, uint32_t format)
 {
 	struct wl_shm_buffer *buffer;
 	void *data;