diff --git a/ASTree.cpp b/ASTree.cpp
index c2794d3f3..9031e390a 100644
--- a/ASTree.cpp
+++ b/ASTree.cpp
@@ -432,7 +432,7 @@ PycRef<ASTNode> BuildFromCode(PycRef<PycCode> code, PycModule* mod)
                 PycRef<ASTNode> TOS = stack.top();
                 int TOS_type = TOS.type();
                 // bases are NODE_NAME at TOS
-                while (TOS_type == ASTNode::NODE_NAME) {
+                while (TOS_type == ASTNode::NODE_NAME || TOS_type == ASTNode::NODE_BINARY) {
                     bases.resize(basecnt + 1);
                     bases[basecnt] = TOS;
                     basecnt++;