diff --git a/bignum.c b/bignum.c
index e73f6190bf528b8b29b0fa0696661cf598e8b575..bb18791b8d9bbef884547419e968766b6a6fd19f 100644
--- a/bignum.c
+++ b/bignum.c
@@ -27,8 +27,6 @@
 # include "config.h"
 #endif
 
-#if HAVE_LIBGMP
-
 #include <assert.h>
 #include <string.h>
 
@@ -195,5 +193,3 @@ nettle_mpz_init_set_str_256_s(mpz_t x,
   mpz_init(x);
   nettle_mpz_set_str_256_s(x, length, s);
 }
-
-#endif /* HAVE_LIBGMP */