diff --git a/firefox.spec b/firefox.spec
index 4386d7a..6cf31c1 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -617,7 +617,6 @@ Provides: bundled(woff2)
 Provides: bundled(xsimd)
 Provides: bundled(xz-embedded)
 Provides: bundled(ycbcr)
-Provides: bundled(zlib)
 Provides: bundled(zstd)
 Provides: bundled(Zycore)
 Provides: bundled(Zydis)
diff --git a/process-official-tarball b/process-official-tarball
index a2c456b..73cb6b4 100755
--- a/process-official-tarball
+++ b/process-official-tarball
@@ -20,6 +20,8 @@ rm -vf ./process-tarball-dir/*/third_party/python/pip/pip-24.0.dist-info/AUTHORS
 
 # We uses system freetype2
 rm -vrf ./process-tarball-dir/*/modules/freetype2
+# We use system zlib
+rm -vrf ./process-tarball-dir/*/modules/zlib
 
 processed_tarball=${1/source/processed-source}