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-rw-r--r--src/newgrf_commons.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/newgrf_commons.cpp b/src/newgrf_commons.cpp
index 68269c643..2ba38fe6e 100644
--- a/src/newgrf_commons.cpp
+++ b/src/newgrf_commons.cpp
@@ -195,10 +195,10 @@ void IndustryOverrideManager::SetEntitySpec(IndustrySpec *inds)
if (ind_id == invalid_ID) { // not found? So this is the introduction of a new industry
/* Second step is dealing with the override. */
- if (inds->grf_prop.override != invalid_ID && _industry_specs[inds->grf_prop.override].grf_prop.override == invalid_ID) {
+ if (inds->grf_prop.override != invalid_ID && _industry_specs[inds->grf_prop.override].grf_prop.grffile == NULL) {
/* this is an override, which means it will take the place of the industry it is
* designed to replace. Before we conclude that the override is allowed,
- * we first need to verify that the slot is not holding another override
+ * we first need to verify that the slot is not holding another industry from a grf
* If it's the case,it will be considered as a normal substitute */
ind_id = inds->grf_prop.override;
} else {