diff --git a/xf86drm.c b/xf86drm.c
index 4791a053..720952ff 100644
--- a/xf86drm.c
+++ b/xf86drm.c
@@ -823,6 +823,13 @@ int drmGetCap(int fd, uint64_t capability, uint64_t *value)
 	return 0;
 }
 
+int drmSetClientCap(int fd, uint64_t capability, uint64_t value)
+{
+	struct drm_set_client_cap cap  = { capability, value };
+
+	return drmIoctl(fd, DRM_IOCTL_SET_CLIENT_CAP, &cap);
+}
+
 /**
  * Free the bus ID information.
  *
diff --git a/xf86drm.h b/xf86drm.h
index 5ecb2846..1e763a3d 100644
--- a/xf86drm.h
+++ b/xf86drm.h
@@ -609,6 +609,8 @@ extern int           drmUpdateDrawableInfo(int fd, drm_drawable_t handle,
 					   unsigned int num, void *data);
 extern int           drmCtlInstHandler(int fd, int irq);
 extern int           drmCtlUninstHandler(int fd);
+extern int           drmSetClientCap(int fd, uint64_t capability,
+				     uint64_t value);
 
 /* General user-level programmer's API: authenticated client and/or X */
 extern int           drmMap(int fd,