diff --git a/neo/tools/compilers/aas/BrushBSP.cpp b/neo/tools/compilers/aas/BrushBSP.cpp
index c77d1a6a..7cbe1075 100644
--- a/neo/tools/compilers/aas/BrushBSP.cpp
+++ b/neo/tools/compilers/aas/BrushBSP.cpp
@@ -1418,13 +1418,13 @@ void idBrushBSP::FloodThroughPortals_r( idBrushBSPNode *node, int contents, int
 	idBrushBSPPortal *p;
 	int s;
 
-	if ( node->occupied ) {
-		common->Error( "FloodThroughPortals_r: node already occupied\n" );
-	}
 	if ( !node ) {
 		common->Error( "FloodThroughPortals_r: NULL node\n" );
 	}
 
+	if ( node->occupied ) {
+		common->Error( "FloodThroughPortals_r: node already occupied\n" );
+	}
 	node->occupied = depth;
 
 	for ( p = node->portals; p; p = p->next[s] ) {