diff --git a/test/test_dirfuncs_compat.c b/test/test_dirfuncs_compat.c
index 6148d41..689b6cc 100644
--- a/test/test_dirfuncs_compat.c
+++ b/test/test_dirfuncs_compat.c
@@ -35,6 +35,7 @@
 #define seekdir     __mpls_seekdir
 #define rewinddir   __mpls_rewinddir
 #define closedir    __mpls_closedir
+#undef dirfd
 #define dirfd       __mpls_dirfd
 
 #include "test_fdopendir.c"