diff --git a/objectivec/GPBUnknownField.m b/objectivec/GPBUnknownField.m index 9d5c97f382..7fa8cade2d 100644 --- a/objectivec/GPBUnknownField.m +++ b/objectivec/GPBUnknownField.m @@ -32,6 +32,7 @@ #import "GPBArray.h" #import "GPBCodedOutputStream_PackagePrivate.h" +#import "GPBUnknownFieldSet.h" @implementation GPBUnknownField { @protected