diff --git a/src/globals/test-extensions.php b/src/globals/test-extensions.php
index 3c361717..dda53a77 100644
--- a/src/globals/test-extensions.php
+++ b/src/globals/test-extensions.php
@@ -35,7 +35,7 @@ $test_os = [
 $zig = true;
 // temporary!
 if ($zig) {
-    putenv('SPC_LIBC=musl');
+    putenv('SPC_LIBC=glibc');
     putenv('SPC_LIBC_VERSION=2.17');
     putenv('CC=zig-cc');
     putenv('CXX=zig-c++');