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-rw-r--r--ruby/ext/google/protobuf_c/message.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/ruby/ext/google/protobuf_c/message.c b/ruby/ext/google/protobuf_c/message.c
index d0b09014..7e58a617 100644
--- a/ruby/ext/google/protobuf_c/message.c
+++ b/ruby/ext/google/protobuf_c/message.c
@@ -88,8 +88,7 @@ static VALUE which_oneof_field(MessageHeader* self, const upb_oneofdef* o) {
fields[upb_fielddef_index(first_field)].case_offset;
uint32_t oneof_case = *((uint32_t*)(Message_data(self) + case_ofs));
- // oneof_case == 0 indicates no field set.
- if (oneof_case == 0) {
+ if (oneof_case == ONEOF_CASE_NONE) {
return Qnil;
}