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-rw-r--r--src/newgrf_spritegroup.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/newgrf_spritegroup.cpp b/src/newgrf_spritegroup.cpp
index 8f44ef9c5..a5d689bbf 100644
--- a/src/newgrf_spritegroup.cpp
+++ b/src/newgrf_spritegroup.cpp
@@ -252,7 +252,7 @@ const SpriteGroup *DeterministicSpriteGroup::Resolve(ResolverObject &object) con
object.last_value = last_value;
- if (this->num_ranges == 0) {
+ if (this->calculated_result) {
/* nvar == 0 is a special case -- we turn our value into a callback result */
if (value != CALLBACK_FAILED) value = GB(value, 0, 15);
static CallbackResultSpriteGroup nvarzero(0, true);