diff --git a/src/park.c b/src/park.c
index 741137e30d..027c08aa26 100644
--- a/src/park.c
+++ b/src/park.c
@@ -83,7 +83,7 @@ void park_init()
 	RCT2_GLOBAL(0x01357846, uint16) = 0;
 	RCT2_GLOBAL(0x013573FE, uint16) = 0;
 	RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_PARK_RATING, uint16) = 0;
-	RCT2_GLOBAL(RCT2_ADDRESS_GUEST_GENERATION_PROBABILITY, uint16) = 0;
+	_guestGenerationProbability = 0;
 	RCT2_GLOBAL(RCT2_TOTAL_RIDE_VALUE, uint16) = 0;
 	RCT2_GLOBAL(0x01357CF4, sint32) = -1;
 
@@ -580,4 +580,13 @@ void park_update()
 
 	// Generate new guests
 	park_generate_new_guests();
+}
+
+/**
+ *
+ *  rct2: 0x0066A231
+ */
+void park_update_histories()
+{
+	RCT2_CALLPROC_EBPSAFE(0x0066A231);
 }
\ No newline at end of file
diff --git a/src/park.h b/src/park.h
index 658ee71023..94a98789fc 100644
--- a/src/park.h
+++ b/src/park.h
@@ -80,5 +80,6 @@ money32 calculate_company_value();
 void reset_park_entrances();
 
 void park_update();
+void park_update_histories();
 
 #endif
diff --git a/src/scenario.c b/src/scenario.c
index 01b656626d..51ea46cc00 100644
--- a/src/scenario.c
+++ b/src/scenario.c
@@ -616,7 +616,7 @@ void scenario_update()
 					break;
 			}
 		}
-		RCT2_CALLPROC_EBPSAFE(0x0066A231); // update histories (finance, ratings, etc)
+		park_update_histories();
 		park_calculate_size();
 	}