diff --git a/rtc_tools/BUILD.gn b/rtc_tools/BUILD.gn
index 3755967..f909650 100644
--- a/rtc_tools/BUILD.gn
+++ b/rtc_tools/BUILD.gn
@@ -5,9 +5,10 @@
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
-
-import("//third_party/protobuf/proto_library.gni")
 import("../webrtc.gni")
+if (rtc_enable_protobuf) {
+  import("//third_party/protobuf/proto_library.gni")
+}
 
 group("rtc_tools") {
   # This target shall build all targets in tools/.
diff --git a/rtc_tools/network_tester/BUILD.gn b/rtc_tools/network_tester/BUILD.gn
index 5445138..70c15bb 100644
--- a/rtc_tools/network_tester/BUILD.gn
+++ b/rtc_tools/network_tester/BUILD.gn
@@ -6,8 +6,10 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("//third_party/protobuf/proto_library.gni")
 import("../../webrtc.gni")
+if (rtc_enable_protobuf) {
+  import("//third_party/protobuf/proto_library.gni")
+}
 
 if (rtc_enable_protobuf) {
   proto_library("network_tester_config_proto") {