diff --git a/src/openrct2/management/Marketing.h b/src/openrct2/management/Marketing.h
index 65e902b351..551b0e08bc 100644
--- a/src/openrct2/management/Marketing.h
+++ b/src/openrct2/management/Marketing.h
@@ -37,7 +37,9 @@ enum{
     VOUCHER_TYPE_FOOD_OR_DRINK_FREE,
 };
 
-#define CAMPAIGN_ACTIVE_FLAG (1 << 7)
+enum {
+    CAMPAIGN_ACTIVE_FLAG = (1 << 7)
+};
 
 #ifdef __cplusplus
 extern "C" {