diff --git a/src/openrct2/rct2/S6Importer.cpp b/src/openrct2/rct2/S6Importer.cpp
index 2f1922f144..17823c8b9b 100644
--- a/src/openrct2/rct2/S6Importer.cpp
+++ b/src/openrct2/rct2/S6Importer.cpp
@@ -830,7 +830,7 @@ public:
     {
         // The number of riders might have overflown or underflown. Re-calculate the value.
         uint16_t numRiders = 0;
-        for (const rct_sprite sprite : _s6.sprites)
+        for (const rct_sprite& sprite : _s6.sprites)
         {
             if (sprite.generic.sprite_identifier == SPRITE_IDENTIFIER_PEEP)
             {