diff --git a/google/BUILD.gn b/google/BUILD.gn
index 122cef5..05509d0 100644
--- a/google/BUILD.gn
+++ b/google/BUILD.gn
@@ -55,5 +55,8 @@ static_library("compression_utils_portable") {
     "compression_utils_portable.cc",
     "compression_utils_portable.h",
   ]
+  defines = [ 
+    "USE_SYSTEM_ZLIB=1"
+  ]
   public_deps = [ ".." ]
 }
