diff --git a/subprojects/gst-plugins-bad/gst-libs/gst/d3d12/meson.build b/subprojects/gst-plugins-bad/gst-libs/gst/d3d12/meson.build
index 501037347c..4bb3887ab6 100644
--- a/subprojects/gst-plugins-bad/gst-libs/gst/d3d12/meson.build
+++ b/subprojects/gst-plugins-bad/gst-libs/gst/d3d12/meson.build
@@ -58,6 +58,10 @@ else
     '-Wno-unknown-pragmas',
     # Various warnings in DirectX-Headers headers
     '-Wno-switch',
+    # Ignore missing fallthrough in DirectX-Headers headers
+    '-Wimplicit-fallthrough=0',
+    # Ignore definition issues
+    '-Wno-undef',
   ])
 endif
 
diff --git a/subprojects/gst-plugins-bad/sys/d3d12/meson.build b/subprojects/gst-plugins-bad/sys/d3d12/meson.build
index 715fe5e29b..958f73f4bd 100644
--- a/subprojects/gst-plugins-bad/sys/d3d12/meson.build
+++ b/subprojects/gst-plugins-bad/sys/d3d12/meson.build
@@ -62,6 +62,9 @@ else
     '-Wno-unknown-pragmas',
     # Various warnings in DirectX-Headers headers
     '-Wno-switch',
+    # Ignore missing fallthrough in DirectX-Headers headers
+    '-Wimplicit-fallthrough=0',
+    '-Wno-undef'
   ])
 endif