diff --git a/source/duke3d/src/actors.cpp b/source/duke3d/src/actors.cpp
index caa704de3..b1cca4659 100644
--- a/source/duke3d/src/actors.cpp
+++ b/source/duke3d/src/actors.cpp
@@ -155,7 +155,7 @@ void A_RadiusDamage(int spriteNum, int blastRadius, int dmg1, int dmg2, int dmg3
 
                 if (otherSector == numSectors)
                 {
-                    if (numSectors == ARRAY_SIZE(sectorList))
+                    if (numSectors == ARRAY_SSIZE(sectorList))
                         goto SKIPWALLCHECK;  // prevent oob access of 'sectorlist'
 
                     sectorList[numSectors++] = nextSector;