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-rw-r--r--erts/emulator/beam/sys.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h
index dfe82cab44..2d0628f70e 100644
--- a/erts/emulator/beam/sys.h
+++ b/erts/emulator/beam/sys.h
@@ -99,6 +99,10 @@
#define ErtsContainerStruct(ptr, type, member) \
((type *)((char *)(1 ? (ptr) : &((type *)0)->member) - offsetof(type, member)))
+/* Use this variant when the member is an array */
+#define ErtsContainerStruct_(ptr, type, memberv) \
+ ((type *)((char *)(1 ? (ptr) : ((type *)0)->memberv) - offsetof(type, memberv)))
+
#if defined (__WIN32__)
# include "erl_win_sys.h"
#else