diff --git a/xf86drmMode.c b/xf86drmMode.c
index a6bb2ee4..7ca89b37 100644
--- a/xf86drmMode.c
+++ b/xf86drmMode.c
@@ -906,7 +906,7 @@ int drmModePageFlip(int fd, uint32_t crtc_id, uint32_t fb_id,
 
 int drmModeSetPlane(int fd, uint32_t plane_id, uint32_t crtc_id,
 		    uint32_t fb_id, uint32_t flags,
-		    uint32_t crtc_x, uint32_t crtc_y,
+		    int32_t crtc_x, int32_t crtc_y,
 		    uint32_t crtc_w, uint32_t crtc_h,
 		    uint32_t src_x, uint32_t src_y,
 		    uint32_t src_w, uint32_t src_h)
diff --git a/xf86drmMode.h b/xf86drmMode.h
index 9bcb1d10..6eab5656 100644
--- a/xf86drmMode.h
+++ b/xf86drmMode.h
@@ -445,7 +445,7 @@ extern drmModePlaneResPtr drmModeGetPlaneResources(int fd);
 extern drmModePlanePtr drmModeGetPlane(int fd, uint32_t plane_id);
 extern int drmModeSetPlane(int fd, uint32_t plane_id, uint32_t crtc_id,
 			   uint32_t fb_id, uint32_t flags,
-			   uint32_t crtc_x, uint32_t crtc_y,
+			   int32_t crtc_x, int32_t crtc_y,
 			   uint32_t crtc_w, uint32_t crtc_h,
 			   uint32_t src_x, uint32_t src_y,
 			   uint32_t src_w, uint32_t src_h);