diff --git a/Quake/progs.h b/Quake/progs.h
index bb4e24b45..6327934e0 100644
--- a/Quake/progs.h
+++ b/Quake/progs.h
@@ -295,6 +295,7 @@ typedef struct areanode_s
 	link_t             trigger_edicts;
 	link_t             solid_edicts;
 } areanode_t;
+#define VANILLA_AREA_DEPTH 4
 #define MAX_AREA_DEPTH 9
 #define AREA_NODES (2<<MAX_AREA_DEPTH)
 
diff --git a/Quake/world.c b/Quake/world.c
index 88181a970..7c5a34395 100644
--- a/Quake/world.c
+++ b/Quake/world.c
@@ -203,7 +203,7 @@ areanode_t *SV_CreateAreaNode (int depth, vec3_t mins, vec3_t maxs)
 	else
 		anode->axis = 1;
 
-	if (depth == MAX_AREA_DEPTH || size[anode->axis] < 500)
+	if (pr_checkextension.value ? depth == MAX_AREA_DEPTH || size[anode->axis] < 500 : depth == VANILLA_AREA_DEPTH)
 	{
 		anode->axis = -1;
 		anode->children[0] = anode->children[1] = NULL;