diff --git a/src/town.h b/src/town.h
--- a/src/town.h
+++ b/src/town.h
@@ -304,7 +304,7 @@ void MakeDefaultName(T *obj)
  * Converts original town ticks counters to plain game ticks. Note that
  * tick 0 is a valid tick so actual amount is one more than the counter value.
  */
-static inline uint16_t TownTicksToGameTicks(uint16_t ticks)
+inline uint16_t TownTicksToGameTicks(uint16_t ticks)
 {
 	return (std::min(ticks, MAX_TOWN_GROWTH_TICKS) + 1) * Ticks::TOWN_GROWTH_TICKS - 1;
 }