diff --git a/index/zl/zlib/zlib-external.toml b/index/zl/zlib/zlib-external.toml
index c6010dfa..9e824de8 100644
--- a/index/zl/zlib/zlib-external.toml
+++ b/index/zl/zlib/zlib-external.toml
@@ -9,3 +9,4 @@ maintainers-logins = ["mosteo"]
 kind = "system"
 [external.origin."case(distribution)"]
 "debian|ubuntu" = ["zlib1g-dev"]
+msys2 = ["mingw-w64-x86_64-zlib"]