diff --git a/projects/samba/build.sh b/projects/samba/build.sh
index 2f7ee4d41486..2b686fe03515 100755
--- a/projects/samba/build.sh
+++ b/projects/samba/build.sh
@@ -16,5 +16,9 @@
 ################################################################################
 
 export CFLAGS="$CFLAGS -Wno-error=strict-prototypes -Wno-error=format-truncation"
+
+if [ -f /usr/local/bin/clang-21 ]; then
+  export CFLAGS="${CFLAGS} -Wno-error=uninitialized-const-pointer -Wno-error=sometimes-uninitialized"
+fi
 # The real script is maintained in the Samba repo
 exec lib/fuzzing/oss-fuzz/build_samba.sh