diff --git a/lib/libspl/include/sys/sunddi.h b/lib/libspl/include/sys/sunddi.h
index 6f3a191242..06648e4c4c 100644
--- a/lib/libspl/include/sys/sunddi.h
+++ b/lib/libspl/include/sys/sunddi.h
@@ -24,7 +24,7 @@
  */
 
 #ifndef	_SYS_SUNDDI_H
-#define	_SYS_SUNDDI_Ha
+#define	_SYS_SUNDDI_H
 
 #include <sys/types.h>