diff --git a/src/jemalloc.c b/src/jemalloc.c
index c1b05dbb..3c595bab 100644
--- a/src/jemalloc.c
+++ b/src/jemalloc.c
@@ -447,7 +447,6 @@ arena_migrate(tsd_t *tsd, unsigned oldind, unsigned newind) {
 	arena_nthreads_dec(oldarena, false);
 	arena_nthreads_inc(newarena, false);
 	tsd_arena_set(tsd, newarena);
-	tsd_iarena_set(tsd, newarena);
 }
 
 static void