1 files changed, 7 insertions, 3 deletions
diff --git a/engines/glk/archetype/statement.h b/engines/glk/archetype/statement.h
index 0be8c1b9a0..62c2095797 100644
--- a/engines/glk/archetype/statement.h
+++ b/engines/glk/archetype/statement.h
@@ -34,7 +34,7 @@ enum StatementKind {
 	ST_DESTROY, ST_WRITE, ST_WRITES, ST_STOP, CONT_SEQ, END_SEQ
 };
 
-union StatementType;
+struct StatementType;
 typedef StatementType *StatementPtr;
 
 struct StmtCompound {
@@ -74,8 +74,7 @@ struct StmtWrite {
 	ListType print_list;
 };
 
-union StatementType {
-	StatementKind _kind;
+union StatementTypeData {
 	StmtCompound _compound;
 	StmtExpr _expr;
 	StmtIf _if;
@@ -86,6 +85,11 @@ union StatementType {
 	StmtWrite _write;
 };
 
+struct StatementType {
+	StatementKind _kind;
+	StatementTypeData _data;
+};
+
 struct CasePairType {
 	ExprTree value;
 	StatementPtr action;