diff --git a/cbits/HsUnixCompat.c b/cbits/HsUnixCompat.c
index 1f7f189..5de35f5 100644
--- a/cbits/HsUnixCompat.c
+++ b/cbits/HsUnixCompat.c
@@ -6,2 +6,4 @@
 
+#include <sys/sysmacros.h> /* TODO: glibc()-specific macro */
+
 unsigned int unix_major(dev_t dev)