diff --git a/asn1/asn1c/constr_SET_OF_oer.c b/asn1/asn1c/constr_SET_OF_oer.c
index 88d7a2a1b4a..dc371aec50d 100644
--- a/asn1/asn1c/constr_SET_OF_oer.c
+++ b/asn1/asn1c/constr_SET_OF_oer.c
@@ -45,10 +45,10 @@
 #undef  RETURN
 #define RETURN(_code)                    \
     do {                                 \
-        asn_dec_rval_t rval;             \
-        rval.code = _code;               \
-        rval.consumed = consumed_myself; \
-        return rval;                     \
+        asn_dec_rval_t _rval;            \
+        _rval.code = _code;              \
+        _rval.consumed = consumed_myself;\
+        return _rval;                    \
     } while(0)
 
 /*