diff --git a/m4/type-sizes.m4 b/m4/type-sizes.m4
index 2c72adca56ed6090ac9a5cdea926f6970936e03b..da23ca16a7bcbeaf643d2e11a72673dab3a082b4 100644
--- a/m4/type-sizes.m4
+++ b/m4/type-sizes.m4
@@ -18,4 +18,6 @@ AC_CHECK_SIZEOF(void *)
 AC_CHECK_SIZEOF(float)
 AC_CHECK_SIZEOF(double)
 AC_CHECK_SIZEOF(long double)
+# Cache check-point
+AC_CACHE_SAVE
 ])