diff --git a/src/economy.cpp b/src/economy.cpp
index 03a15ab256..5a913fb39b 100644
--- a/src/economy.cpp
+++ b/src/economy.cpp
@@ -643,7 +643,7 @@ static void AddInflation()
 	 * 12 -> months per year
 	 * This is only a good approxiamtion for small values
 	 */
-	Money inf = _economy.infl_amount * 54;
+	int32 inf = _economy.infl_amount * 54;
 
 	for (uint i = 0; i != NUM_PRICES; i++) {
 		AddSingleInflation((Money*)&_price + i, _price_frac + i, inf);
diff --git a/src/economy_type.h b/src/economy_type.h
index 02b515ce43..ae00296ead 100644
--- a/src/economy_type.h
+++ b/src/economy_type.h
@@ -18,7 +18,7 @@ struct Economy {
 	int fluct;
 	byte interest_rate;     ///< Interest
 	byte infl_amount;       ///< inflation amount
-	byte infl_amount_pr;    ///< "floating" portion of inflation
+	byte infl_amount_pr;    ///< inflation rate for payment rates
 };
 
 struct Subsidy {