1 files changed, 1 insertions, 1 deletions
diff --git a/byterun/memory.c b/byterun/memory.c
index 775146207..e18bde45c 100644
--- a/byterun/memory.c
+++ b/byterun/memory.c
@@ -538,7 +538,7 @@ CAMLexport void caml_modify (value *fp, value val)
   */
   value old;
 
-  if (Is_young(fp)) {
+  if (Is_young((value)fp)) {
     /* The modified object resides in the minor heap.
        Conditions 1 and 2 cannot occur. */
     *fp = val;