diff --git a/openssl-sys/src/lib.rs b/openssl-sys/src/lib.rs
index 8ad26003..6fe44750 100644
--- a/openssl-sys/src/lib.rs
+++ b/openssl-sys/src/lib.rs
@@ -504,6 +504,11 @@ extern {
                                 type_: *const EVP_MD,
                                 e: *mut ENGINE,
                                 pkey: *mut EVP_PKEY) -> c_int;
+    #[cfg(ossl101)]
+    pub fn EVP_DigestVerifyFinal(ctx: *mut EVP_MD_CTX,
+                                 sigret: *mut c_uchar,
+                                 siglen: size_t) -> c_int;
+    #[cfg(not(ossl101))]
     pub fn EVP_DigestVerifyFinal(ctx: *mut EVP_MD_CTX,
                                  sigret: *const c_uchar,
                                  siglen: size_t) -> c_int;
diff --git a/openssl-sys/src/ossl10x.rs b/openssl-sys/src/ossl10x.rs
index 16d669b0..595b673b 100644
--- a/openssl-sys/src/ossl10x.rs
+++ b/openssl-sys/src/ossl10x.rs
@@ -2,7 +2,9 @@ use std::sync::{Mutex, MutexGuard};
 use std::sync::{Once, ONCE_INIT};
 use std::mem;
 
-use libc::{c_int, c_char, c_void, c_long, c_uchar, size_t, c_uint, c_ulong, time_t};
+use libc::{c_int, c_char, c_void, c_long, c_uchar, size_t, c_uint, c_ulong};
+#[cfg(not(ossl101))]
+use libc::time_t;
 
 #[repr(C)]
 pub struct stack_st_ASN1_OBJECT {
diff --git a/openssl/src/crypto/sign.rs b/openssl/src/crypto/sign.rs
index 47549574..db3be9fa 100644
--- a/openssl/src/crypto/sign.rs
+++ b/openssl/src/crypto/sign.rs
@@ -113,7 +113,7 @@ impl<'a> Verifier<'a> {
     pub fn finish(&self, signature: &[u8]) -> Result<(), ErrorStack> {
         unsafe {
             try_ssl_if!(ffi::EVP_DigestVerifyFinal(self.0,
-                                                   signature.as_ptr() as *const _,
+                                                   signature.as_ptr() as *const _ as _,
                                                    signature.len()) != 1);
             Ok(())
         }