summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--src/newgrf.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index 4cd61b95c..216bdc190 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -5907,7 +5907,8 @@ static uint32 GetParamVal(byte param, uint32 *cond_val)
/* Supported in Action 0x07 and 0x09, not 0x0D */
return 0;
} else {
- uint32 param_val = _ttdpatch_flags[*cond_val / 0x20];
+ uint32 index = *cond_val / 0x20;
+ uint32 param_val = index < lengthof(_ttdpatch_flags) ? _ttdpatch_flags[index] : 0;
*cond_val %= 0x20;
return param_val;
}