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-rw-r--r--src/newgrf.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index 6ed173463..508e8305c 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -4381,7 +4381,8 @@ static void GRFLoadError(byte *buf, size_t len)
/* Only two parameter numbers can be used in the string. */
uint i = 0;
for (; i < 2 && len > 0; i++) {
- error->param_number[i] = grf_load_byte(&buf);
+ uint param_number = grf_load_byte(&buf);
+ error->param_value[i] = (param_number < _cur_grffile->param_end ? _cur_grffile->param[param_number] : 0);
len--;
}
error->num_params = i;