1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/yosys.h b/kernel/yosys.h
index a80cb00b4..179bfe07a 100644
--- a/kernel/yosys.h
+++ b/kernel/yosys.h
@@ -210,6 +210,7 @@ namespace RTLIL {
 	struct Module;
 	struct Design;
 	struct Monitor;
+	enum State : unsigned char;
 }
 
 namespace AST {