diff --git a/.gitattributes b/.gitattributes
index cf54629ac4ebb5c77a1e2d95d2cec3c2cf54646c..319f0af9a46bcc949a82b5f18102dfbdf463e17f 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -326,7 +326,6 @@ testfont binary
 /src/apply_low.h foreign_ident
 /src/array.h foreign_ident
 /src/backend.h foreign_ident
-/src/bignum.c foreign_ident
 /src/bignum.h foreign_ident
 /src/block_alloc_h.h foreign_ident
 /src/builtin_functions.c foreign_ident
diff --git a/src/bignum.c b/src/bignum.c
index 957a2565236d1686b93436258966e2e19af07ae6..520aa380910c70fbef147760e7609ee213b650ea 100644
--- a/src/bignum.c
+++ b/src/bignum.c
@@ -2,7 +2,7 @@
 || This file is part of Pike. For copyright information see COPYRIGHT.
 || Pike is distributed under GPL, LGPL and MPL. See the file COPYING
 || for more information.
-|| $Id: bignum.c,v 1.45 2008/05/30 15:19:02 mast Exp $
+|| $Id$
 */
 
 #include "global.h"
@@ -39,26 +39,16 @@ void exit_auto_bignum(void)
 
 PMOD_EXPORT void convert_stack_top_to_bignum(void)
 {
+  if (auto_bignum_program.type!=T_PROGRAM)
+    Pike_error("Gmp.mpz conversion failed (Gmp.bignum not loaded).\n");
   apply_svalue(&auto_bignum_program, 1);
-
-  if(sp[-1].type != T_OBJECT) {
-     if (auto_bignum_program.type!=T_PROGRAM)
-	Pike_error("Gmp.mpz conversion failed (Gmp.bignum not loaded).\n");
-     else
-	Pike_error("Gmp.mpz conversion failed (unknown error).\n");
-  }
 }
 
 PMOD_EXPORT void convert_stack_top_with_base_to_bignum(void)
 {
+  if (auto_bignum_program.type!=T_PROGRAM)
+    Pike_error("Gmp.mpz conversion failed (Gmp.bignum not loaded).\n");
   apply_svalue(&auto_bignum_program, 2);
-
-  if(sp[-1].type != T_OBJECT) {
-     if (auto_bignum_program.type!=T_PROGRAM)
-	Pike_error("Gmp.mpz conversion failed (Gmp.bignum not loaded).\n");
-     else
-	Pike_error("Gmp.mpz conversion failed (unknown error).\n");
-  }
 }
 
 int is_bignum_object(struct object *o)