diff --git a/src/object.c b/src/object.c
index eb2af65aaf..da5173fb1b 100644
--- a/src/object.c
+++ b/src/object.c
@@ -292,7 +292,7 @@ void object_unload(int groupIndex, rct_object_entry_extended *entry)
 	RCT2_CALLPROC_X(0x006A9CAF, 0, groupIndex, 0, 0, 0, 0, (int)entry);
 }
 
-static int object_entry_compare(rct_object_entry *a, rct_object_entry *b)
+int object_entry_compare(rct_object_entry *a, rct_object_entry *b)
 {
 	if (a->flags & 0xF0) {
 		if ((a->flags & 0x0F) != (b->flags & 0x0F))
diff --git a/src/object.h b/src/object.h
index 6f26351874..8703b559b7 100644
--- a/src/object.h
+++ b/src/object.h
@@ -45,7 +45,7 @@ typedef struct {
 	uint32 extended;
 } rct_object_entry_extended;
 
-int object_entry_group_counts[];
+extern int object_entry_group_counts[];
 
 void object_list_load();
 int object_read_and_load_entries(FILE *file);