diff --git a/src/gallium/drivers/radeon/r600_buffer_common.c b/src/gallium/drivers/radeon/r600_buffer_common.c
index 70c8eb2695e..33ba0fbca9b 100644
--- a/src/gallium/drivers/radeon/r600_buffer_common.c
+++ b/src/gallium/drivers/radeon/r600_buffer_common.c
@@ -213,6 +213,10 @@ static bool
 r600_invalidate_buffer(struct r600_common_context *rctx,
 		       struct r600_resource *rbuffer)
 {
+	/* Shared buffers can't be reallocated. */
+	if (rbuffer->is_shared)
+		return false;
+
 	/* In AMD_pinned_memory, the user pointer association only gets
 	 * broken when the buffer is explicitly re-allocated.
 	 */