diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/Painting/BUILD.gn b/Meta/gn/secondary/Userland/Libraries/LibWeb/Painting/BUILD.gn
index e6b871875c2..b8fe5999df1 100644
--- a/Meta/gn/secondary/Userland/Libraries/LibWeb/Painting/BUILD.gn
+++ b/Meta/gn/secondary/Userland/Libraries/LibWeb/Painting/BUILD.gn
@@ -5,6 +5,7 @@ source_set("Painting") {
     "//Userland/",  # For LibGfx needing LibGUI needing WindowServer types
   ]
   sources = [
+    "AffineCommandExecutorCPU.cpp",
     "AudioPaintable.cpp",
     "BackgroundPainting.cpp",
     "BorderPainting.cpp",
diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/WebAudio/BUILD.gn b/Meta/gn/secondary/Userland/Libraries/LibWeb/WebAudio/BUILD.gn
index 1e67b4a75c7..c0bfe928252 100644
--- a/Meta/gn/secondary/Userland/Libraries/LibWeb/WebAudio/BUILD.gn
+++ b/Meta/gn/secondary/Userland/Libraries/LibWeb/WebAudio/BUILD.gn
@@ -18,6 +18,8 @@ source_set("WebAudio") {
     "BaseAudioContext.h",
     "DynamicsCompressorNode.cpp",
     "DynamicsCompressorNode.h",
+    "GainNode.cpp",
+    "GainNode.h",
     "OfflineAudioContext.cpp",
     "OfflineAudioContext.h",
     "OscillatorNode.cpp",
diff --git a/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni b/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni
index bf0391f6754..ea7b67aa70d 100644
--- a/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni
+++ b/Meta/gn/secondary/Userland/Libraries/LibWeb/idl_files.gni
@@ -320,6 +320,7 @@ standard_idl_files = [
   "//Userland/Libraries/LibWeb/WebAudio/AudioScheduledSourceNode.idl",
   "//Userland/Libraries/LibWeb/WebAudio/BaseAudioContext.idl",
   "//Userland/Libraries/LibWeb/WebAudio/DynamicsCompressorNode.idl",
+  "//Userland/Libraries/LibWeb/WebAudio/GainNode.idl",
   "//Userland/Libraries/LibWeb/WebAudio/OfflineAudioContext.idl",
   "//Userland/Libraries/LibWeb/WebAudio/OscillatorNode.idl",
   "//Userland/Libraries/LibWeb/WebAudio/PeriodicWave.idl",