diff --git a/api/voip/BUILD.gn b/api/voip/BUILD.gn
index 9e4f68d30e..7624d30e20 100644
--- a/api/voip/BUILD.gn
+++ b/api/voip/BUILD.gn
@@ -21,7 +21,6 @@ rtc_source_set("voip_api") {
   ]
   deps = [
     "..:array_view",
-    "../../rtc_base/system:unused",
     "../audio_codecs:audio_codecs_api",
     "../neteq:neteq_api",
   ]
diff --git a/api/voip/DEPS b/api/voip/DEPS
index 837b9a673e..3845dffab0 100644
--- a/api/voip/DEPS
+++ b/api/voip/DEPS
@@ -3,10 +3,6 @@ specific_include_rules = {
     "+third_party/absl/types/optional.h",
   ],
 
-  "voip_base.h": [
-    "+rtc_base/system/unused.h",
-  ],
-
   "voip_engine_factory.h": [
     "+modules/audio_device/include/audio_device.h",
     "+modules/audio_processing/include/audio_processing.h",
diff --git a/api/voip/voip_base.h b/api/voip/voip_base.h
index d421480881..d469ea4bd4 100644
--- a/api/voip/voip_base.h
+++ b/api/voip/voip_base.h
@@ -13,7 +13,6 @@
 
 #include "absl/base/attributes.h"
 #include "absl/types/optional.h"
-#include "rtc_base/system/unused.h"
 
 namespace webrtc {