diff --git a/tools/gn2bp/Android.bp.swp b/tools/gn2bp/Android.bp.swp
index 34a9f49..9386a23 100644
--- a/tools/gn2bp/Android.bp.swp
+++ b/tools/gn2bp/Android.bp.swp
@@ -2334,6 +2334,7 @@
     name: "cronet_aml_defaults",
     cflags: [
         "-O2",
+        "-Wno-deprecated-non-prototype",
         "-Wno-error=return-type",
         "-Wno-macro-redefined",
         "-Wno-missing-field-initializers",
diff --git a/tools/gn2bp/gen_android_bp b/tools/gn2bp/gen_android_bp
index 0ca97c6..47232a1 100755
--- a/tools/gn2bp/gen_android_bp
+++ b/tools/gn2bp/gen_android_bp
@@ -1239,6 +1239,7 @@
       '-Wno-sign-compare',
       '-Wno-sign-promo',
       '-Wno-unused-parameter',
+      '-Wno-deprecated-non-prototype', # needed for zlib
       '-fvisibility=hidden',
       '-O2',
   ]