diff --git a/compiler/rustc_llvm/build.rs b/compiler/rustc_llvm/build.rs
index 4302b1618331d..f606fa483caf0 100644
--- a/compiler/rustc_llvm/build.rs
+++ b/compiler/rustc_llvm/build.rs
@@ -252,7 +252,10 @@ fn main() {
     } else if target.contains("windows-gnu") {
         println!("cargo:rustc-link-lib=shell32");
         println!("cargo:rustc-link-lib=uuid");
-    } else if target.contains("haiku") || target.contains("darwin") {
+    } else if target.contains("haiku")
+        || target.contains("darwin")
+        || (is_crossed && (target.contains("dragonfly") || target.contains("solaris")))
+    {
         println!("cargo:rustc-link-lib=z");
     } else if target.contains("netbsd") {
         println!("cargo:rustc-link-lib=z");