diff --git a/third_party/zlib/BUILD.gn b/third_party/zlib/BUILD.gn
index d23738cd..a76beed3 100644
--- a/third_party/zlib/BUILD.gn
+++ b/third_party/zlib/BUILD.gn
@@ -197,6 +197,7 @@ source_set("zlib_inflate_chunk_simd") {
   # style function declarations, which triggers warning C4131.
   configs -= [ "//build/config/compiler:chromium_code" ]
   configs += [ "//build/config/compiler:no_chromium_code" ]
+  configs += [ ":zlib_warnings" ]
 
   public_configs = [ ":zlib_inflate_chunk_simd_config" ]
 
@@ -263,8 +264,11 @@ source_set("zlib_slide_hash_simd") {
 }
 
 config("zlib_warnings") {
-  if (is_clang && use_x86_x64_optimizations) {
-    cflags = [ "-Wno-incompatible-pointer-types" ]
+  if (is_clang) {
+    cflags = [ "-Wno-deprecated-non-prototype" ]
+    if (use_x86_x64_optimizations) {
+      cflags += [ "-Wno-incompatible-pointer-types" ]
+    }
   }
 }