diff --git a/call/BUILD.gn b/call/BUILD.gn
index 6d2ea8204f..21d1ac1c94 100644
--- a/call/BUILD.gn
+++ b/call/BUILD.gn
@@ -362,6 +362,7 @@ if (rtc_include_tests) {
       "//testing/gmock",
       "//testing/gtest",
       "//third_party/abseil-cpp/absl/memory",
+      "//third_party/abseil-cpp/absl/types:optional",
     ]
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
diff --git a/logging/BUILD.gn b/logging/BUILD.gn
index f22f61253a..27977d34ca 100644
--- a/logging/BUILD.gn
+++ b/logging/BUILD.gn
@@ -352,6 +352,7 @@ if (rtc_enable_protobuf) {
         "../test:test_support",
         "//testing/gtest",
         "//third_party/abseil-cpp/absl/memory",
+        "//third_party/abseil-cpp/absl/types:optional",
       ]
       if (!build_with_chromium && is_clang) {
         # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
diff --git a/media/BUILD.gn b/media/BUILD.gn
index cc48b069ad..8eaa23ce02 100644
--- a/media/BUILD.gn
+++ b/media/BUILD.gn
@@ -455,6 +455,7 @@ if (rtc_include_tests) {
       "../rtc_base:rtc_task_queue",
       "../rtc_base:stringutils",
       "//third_party/abseil-cpp/absl/memory",
+      "//third_party/abseil-cpp/absl/strings",
     ]
     sources = [
       "base/fakeframesource.cc",
@@ -551,6 +552,7 @@ if (rtc_include_tests) {
       "../rtc_base:stringutils",
       "../test:field_trial",
       "//third_party/abseil-cpp/absl/memory",
+      "//third_party/abseil-cpp/absl/strings",
     ]
     sources = [
       "base/codec_unittest.cc",
diff --git a/modules/audio_coding/BUILD.gn b/modules/audio_coding/BUILD.gn
index 455dcd0c9e..6a630e0889 100644
--- a/modules/audio_coding/BUILD.gn
+++ b/modules/audio_coding/BUILD.gn
@@ -1437,6 +1437,7 @@ if (rtc_include_tests) {
              ":neteq_tools",
              "../../rtc_base:rtc_base_approved",
              "../../test:test_support",
+             "//third_party/abseil-cpp/absl/strings",
              "//testing/gtest",
            ]
   }
@@ -2123,6 +2124,7 @@ if (rtc_include_tests) {
       "codecs/opus/test:test_unittest",
       "//testing/gtest",
       "//third_party/abseil-cpp/absl/memory",
+      "//third_party/abseil-cpp/absl/types:optional",
     ]
 
     defines = audio_coding_defines
diff --git a/pc/BUILD.gn b/pc/BUILD.gn
index bdbcb38964..7663f8b2f2 100644
--- a/pc/BUILD.gn
+++ b/pc/BUILD.gn
@@ -509,6 +509,7 @@ if (rtc_include_tests) {
       "../system_wrappers:metrics",
       "../test:fileutils",
       "//third_party/abseil-cpp/absl/memory",
+      "//third_party/abseil-cpp/absl/strings",
     ]
     if (is_android) {
       deps += [ ":android_black_magic" ]