diff --git a/src/ai/api/ai_subsidy.hpp b/src/ai/api/ai_subsidy.hpp
--- a/src/ai/api/ai_subsidy.hpp
+++ b/src/ai/api/ai_subsidy.hpp
@@ -27,9 +27,9 @@ public:
 	 * @note The list of values may grow in future.
 	 */
 	enum SubsidyParticipantType {
-		SPT_INDUSTRY =    0, //!< Subsidy participant is an industry
-		SPT_TOWN     =    1, //!< Subsidy participant is a town
-		SPT_INVALID  = 0xFF, //!< Invalid/unknown participant type
+		SPT_INDUSTRY =    0, ///< Subsidy participant is an industry
+		SPT_TOWN     =    1, ///< Subsidy participant is a town
+		SPT_INVALID  = 0xFF, ///< Invalid/unknown participant type
 	};
 
 	/**