diff --git a/gdb/config/.Sanitize b/gdb/config/.Sanitize
index f54894db581..5c98859c37a 100644
--- a/gdb/config/.Sanitize
+++ b/gdb/config/.Sanitize
@@ -75,6 +75,7 @@ tm-nbsd.h
 tm-sunos.h
 tm-sysv4.h
 vax
+xm-aix4.h
 xm-lynx.h
 xm-mpw.h
 xm-nbsd.h
diff --git a/gdb/config/rs6000/.Sanitize b/gdb/config/rs6000/.Sanitize
index 26a1e74bce3..2ee7bd58035 100644
--- a/gdb/config/rs6000/.Sanitize
+++ b/gdb/config/rs6000/.Sanitize
@@ -32,6 +32,7 @@ rs6000lynx.mt
 tm-rs6000.h
 tm-rs6000ly.h
 tm-rs6000-aix4.h
+xm-aix4.h
 xm-rs6000.h
 xm-rs6000ly.h