diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index c73b01d722f65..c29c38b1a55ad 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -68,7 +68,7 @@ struct rtas_filter {
  *                            functions are believed to have no users on
  *                            ppc64le, and we want to keep it that way. It does
  *                            not make sense for this to be set when @filter
- *                            is false.
+ *                            is NULL.
  */
 struct rtas_function {
 	s32 token;