diff --git a/mm/ubsan/ubsan.c b/mm/ubsan/ubsan.c
index ec90555dd7..744117af17 100644
--- a/mm/ubsan/ubsan.c
+++ b/mm/ubsan/ubsan.c
@@ -159,7 +159,7 @@ static int64_t get_signed_val(FAR struct type_descriptor *type,
     {
       unsigned bits = type_bit_width(type);
       uint64_t mask = (1llu << bits) - 1;
-      uint64_t ret = (uint64_t)val & mask;
+      uint64_t ret = (uintptr_t)val & mask;
 
       return (int64_t)(((ret & (1llu << (bits - 1))) != 0) ?
              ret | ~mask : ret);