diff --git a/tools/gn/target.cc b/tools/gn/target.cc
index ddc8ad5..85955a7 100644
--- a/tools/gn/target.cc
+++ b/tools/gn/target.cc
@@ -515,6 +515,10 @@
     if (pair.ptr->output_type() == CREATE_BUNDLE)
       continue;
 
+    // Don't propagate across toolchain.
+    if (pair.ptr->toolchain() != toolchain())
+      continue;
+
     // Direct dependency on a bundle_data target.
     if (pair.ptr->output_type() == BUNDLE_DATA)
       bundle_data_.AddBundleData(pair.ptr);