1 files changed, 2 insertions, 0 deletions
diff --git a/bignum.c b/bignum.c
index 8d003796c3..d432b0b031 100644
--- a/bignum.c
+++ b/bignum.c
@@ -44,6 +44,8 @@ static VALUE big_three = Qnil;
 # endif
 #endif
 
+STATIC_ASSERT(sizeof_bdigit_dbl, sizeof(BDIGIT_DBL) == SIZEOF_BDIGIT_DBL);
+
 #ifdef WORDS_BIGENDIAN
 #   define HOST_BIGENDIAN_P 1
 #else