diff --git a/xf86drm.c b/xf86drm.c
index a183eee9..6ea068f4 100644
--- a/xf86drm.c
+++ b/xf86drm.c
@@ -976,7 +976,7 @@ int drmAddMap(int fd, drm_handle_t offset, drmSize size, drmMapType type,
     if (drmIoctl(fd, DRM_IOCTL_ADD_MAP, &map))
 	return -errno;
     if (handle)
-	*handle = (drm_handle_t)map.handle;
+	*handle = (drm_handle_t)(uintptr_t)map.handle;
     return 0;
 }
 
@@ -984,7 +984,7 @@ int drmRmMap(int fd, drm_handle_t handle)
 {
     drm_map_t map;
 
-    map.handle = (void *)handle;
+    map.handle = (void *)(uintptr_t)handle;
 
     if(drmIoctl(fd, DRM_IOCTL_RM_MAP, &map))
 	return -errno;
@@ -2120,7 +2120,7 @@ int drmAddContextPrivateMapping(int fd, drm_context_t ctx_id,
     drm_ctx_priv_map_t map;
 
     map.ctx_id = ctx_id;
-    map.handle = (void *)handle;
+    map.handle = (void *)(uintptr_t)handle;
 
     if (drmIoctl(fd, DRM_IOCTL_SET_SAREA_CTX, &map))
 	return -errno;
@@ -2137,7 +2137,7 @@ int drmGetContextPrivateMapping(int fd, drm_context_t ctx_id,
     if (drmIoctl(fd, DRM_IOCTL_GET_SAREA_CTX, &map))
 	return -errno;
     if (handle)
-	*handle = (drm_handle_t)map.handle;
+	*handle = (drm_handle_t)(uintptr_t)map.handle;
 
     return 0;
 }