diff --git a/libguile/lightening/lightening/lightening.c b/libguile/lightening/lightening/lightening.c
index 572976f40..588e0c3f8 100644
--- a/libguile/lightening/lightening/lightening.c
+++ b/libguile/lightening/lightening/lightening.c
@@ -1233,6 +1233,7 @@ clear_literal_pool(struct jit_literal_pool *pool)
 {
   pool->deadline = -1;
   pool->size = 0;
+  pool->byte_size = 0;
 }
 
 static void