Fix wrong #ifdef usages with #if

Apparently #ifdef is always true

1 files changed, 1 insertions, 1 deletions

diff --git a/mjit.c b/mjit.c
index 3da9d95d3c..cc6e3da889 100644
--- a/mjit.c
+++ b/mjit.c
@@ -887,7 +887,7 @@ skip_cleaning_object_files(struct rb_mjit_unit_list *list)
 
     // No mutex for list, assuming MJIT worker does not exist yet since it's immediately after fork.
     list_for_each_safe(&list->head, unit, next, unode) {
-#ifdef USE_JIT_COMPACTION
+#if USE_JIT_COMPACTION
         if (unit->c_file) unit->c_file_inherited_p = true;
 #endif