diff --git a/lib/libspl/include/sys/types.h b/lib/libspl/include/sys/types.h
index 25c3dcdd46..e59a3befd8 100644
--- a/lib/libspl/include/sys/types.h
+++ b/lib/libspl/include/sys/types.h
@@ -32,6 +32,7 @@
 #include_next <sys/types.h>
 #include <sys/param.h> /* for NBBY */
 #include <sys/types32.h>
+#include <sys/va_list.h>
 
 #ifndef HAVE_INTTYPES
 #include <inttypes.h>