diff --git a/crypto/bn/bn_ctx.c b/crypto/bn/bn_ctx.c
index 9fe87519ee7de2ec17cd13476e46bff3c9f76bff..d5eb02268d325a47e3f78c870d2c09f8856ae5ad 100644
--- a/crypto/bn/bn_ctx.c
+++ b/crypto/bn/bn_ctx.c
@@ -159,7 +159,7 @@ static void ctxdbg(BN_CTX *ctx)
 	unsigned int bnidx = 0, fpidx = 0;
 	BN_POOL_ITEM *item = ctx->pool.head;
 	BN_STACK *stack = &ctx->stack;
-	fprintf(stderr,"(%08x): ", (unsigned int)ctx);
+	fprintf(stderr,"(%16p): ", ctx);
 	while(bnidx < ctx->used)
 		{
 		fprintf(stderr,"%03x ", item->vals[bnidx++ % BN_CTX_POOL_SIZE].dmax);