diff --git a/src/thingdef/thingdef_codeptr.cpp b/src/thingdef/thingdef_codeptr.cpp
index 53685c43b..03f011b41 100644
--- a/src/thingdef/thingdef_codeptr.cpp
+++ b/src/thingdef/thingdef_codeptr.cpp
@@ -3120,7 +3120,7 @@ static bool DoCheckSightOrRange(AActor *self, AActor *camera, double range, bool
 		dz = 0;
 	}
 	double distance = DVector3(pos, twodi? 0. : dz).LengthSquared();
-	if (distance <= range*range)
+	if (distance <= range)
 	{
 		// Within range
 		return true;