diff --git a/src/tools/compiletest/src/util.rs b/src/tools/compiletest/src/util.rs
index 5f6a27e53663..748240cc94bc 100644
--- a/src/tools/compiletest/src/util.rs
+++ b/src/tools/compiletest/src/util.rs
@@ -156,6 +156,8 @@ pub fn dylib_env_var() -> &'static str {
         "DYLD_LIBRARY_PATH"
     } else if cfg!(target_os = "haiku") {
         "LIBRARY_PATH"
+    } else if cfg!(target_os = "aix") {
+        "LIBPATH"
     } else {
         "LD_LIBRARY_PATH"
     }