diff --git a/grpc.gyp b/grpc.gyp
index 20e463ed9e7..8edfcadf956 100644
--- a/grpc.gyp
+++ b/grpc.gyp
@@ -77,6 +77,7 @@
       '.',
       '../..',
       'include',
+      '../../third_party/nanopb',
     ],
     'defines': [
       'GRPC_ARES=0',
diff --git a/templates/grpc.gyp.template b/templates/grpc.gyp.template
index 2ea0d06ebd1..d71de9f441b 100644
--- a/templates/grpc.gyp.template
+++ b/templates/grpc.gyp.template
@@ -70,6 +70,7 @@
         '.',
         '../..',
         'include',
+        '../../third_party/nanopb',
       ],
       'defines': [
         'GRPC_ARES=0',