2 files changed, 5 insertions, 3 deletions
diff --git a/erts/emulator/beam/big.c b/erts/emulator/beam/big.c
index 41a041eba6..4d087bf967 100644
--- a/erts/emulator/beam/big.c
+++ b/erts/emulator/beam/big.c
@@ -1506,13 +1506,15 @@ Eterm uword_to_big(UWord x, Eterm *y)
 */
 Eterm small_to_big(Sint x, Eterm *y)
 {
+    Uint xu;
     if (x >= 0) {
+        xu = x;
 	*y = make_pos_bignum_header(1);
     } else {
-	x = -x;
+        xu = -(Uint)x;
 	*y = make_neg_bignum_header(1);
     }
-    BIG_DIGIT(y, 0) = x;
+    BIG_DIGIT(y, 0) = xu;
     return make_big(y);
 }
 
diff --git a/erts/emulator/beam/io.c b/erts/emulator/beam/io.c
index d028737664..0f86d8e41d 100644
--- a/erts/emulator/beam/io.c
+++ b/erts/emulator/beam/io.c
@@ -7166,7 +7166,7 @@ char *driver_dl_error(void)
 
 
 #define ERL_DRV_SYS_INFO_SIZE(LAST_FIELD) \
-  (((size_t) &((ErlDrvSysInfo *) 0)->LAST_FIELD) \
+  (offsetof(ErlDrvSysInfo, LAST_FIELD) \
    + sizeof(((ErlDrvSysInfo *) 0)->LAST_FIELD))
 
 void