diff --git a/lib/gssapi/gssapi.h b/lib/gssapi/gssapi.h
index 70a2ed38b..6d6cb496f 100644
--- a/lib/gssapi/gssapi.h
+++ b/lib/gssapi/gssapi.h
@@ -50,6 +50,8 @@
 #include <config.h>
 #endif
 
+#include <sys/types.h>
+
 #include <bits.h>
 
 /*
diff --git a/lib/gssapi/krb5/gssapi.h b/lib/gssapi/krb5/gssapi.h
index 70a2ed38b..6d6cb496f 100644
--- a/lib/gssapi/krb5/gssapi.h
+++ b/lib/gssapi/krb5/gssapi.h
@@ -50,6 +50,8 @@
 #include <config.h>
 #endif
 
+#include <sys/types.h>
+
 #include <bits.h>
 
 /*