Index: ext/openssl/openssl_missing.h
===================================================================
--- ext/openssl/openssl_missing.h	(revision 22918)
+++ ext/openssl/openssl_missing.h	(working copy)
@@ -30,33 +30,33 @@
 
 #if !defined(PEM_write_bio_DSAPublicKey)
 # define PEM_write_bio_DSAPublicKey(bp,x) \
-	PEM_ASN1_write_bio((int (*)())i2d_DSAPublicKey,\
+	PEM_ASN1_write_bio((i2d_of_void *)i2d_DSAPublicKey,\
 		PEM_STRING_DSA_PUBLIC,\
 		bp,(char *)x, NULL, NULL, 0, NULL, NULL)
 #endif
 
 #if !defined(DSAPrivateKey_dup)
-# define DSAPrivateKey_dup(dsa) (DSA *)ASN1_dup((int (*)())i2d_DSAPrivateKey, \
+# define DSAPrivateKey_dup(dsa) (DSA *)ASN1_dup((i2d_of_void *)i2d_DSAPrivateKey, \
 	(d2i_of_void *)d2i_DSAPrivateKey,(char *)dsa)
 #endif
 
 #if !defined(DSAPublicKey_dup)
-# define DSAPublicKey_dup(dsa) (DSA *)ASN1_dup((int (*)())i2d_DSAPublicKey, \
+# define DSAPublicKey_dup(dsa) (DSA *)ASN1_dup((i2d_of_void *)i2d_DSAPublicKey, \
 	(d2i_of_void *)d2i_DSAPublicKey,(char *)dsa)
 #endif
 
 #if !defined(X509_REVOKED_dup)
-# define X509_REVOKED_dup(rev) (X509_REVOKED *)ASN1_dup((int (*)())i2d_X509_REVOKED, \
+# define X509_REVOKED_dup(rev) (X509_REVOKED *)ASN1_dup((i2d_of_void *)i2d_X509_REVOKED, \
 	(d2i_of_void *)d2i_X509_REVOKED, (char *)rev)
 #endif
 
 #if !defined(PKCS7_SIGNER_INFO_dup)
-#  define PKCS7_SIGNER_INFO_dup(si) (PKCS7_SIGNER_INFO *)ASN1_dup((int (*)())i2d_PKCS7_SIGNER_INFO, \
+#  define PKCS7_SIGNER_INFO_dup(si) (PKCS7_SIGNER_INFO *)ASN1_dup((i2d_of_void *)i2d_PKCS7_SIGNER_INFO, \
 	(d2i_of_void *)d2i_PKCS7_SIGNER_INFO, (char *)si)
 #endif
 
 #if !defined(PKCS7_RECIP_INFO_dup)
-#  define PKCS7_RECIP_INFO_dup(ri) (PKCS7_RECIP_INFO *)ASN1_dup((int (*)())i2d_PKCS7_RECIP_INFO, \
+#  define PKCS7_RECIP_INFO_dup(ri) (PKCS7_RECIP_INFO *)ASN1_dup((i2d_of_void *)i2d_PKCS7_RECIP_INFO, \
 	(d2i_of_void *)d2i_PKCS7_RECIP_INFO, (char *)ri)
 #endif
 
Index: ext/openssl/ossl_engine.c
===================================================================
--- ext/openssl/ossl_engine.c	(revision 22918)
+++ ext/openssl/ossl_engine.c	(working copy)
@@ -119,7 +119,7 @@
     if(!ENGINE_init(e))
 	ossl_raise(eEngineError, NULL);
     ENGINE_ctrl(e, ENGINE_CTRL_SET_PASSWORD_CALLBACK,
-		0, NULL, (void(*)())ossl_pem_passwd_cb);
+		0, NULL, (void(*)(void))ossl_pem_passwd_cb);
     ERR_clear_error();
 
     return obj;
Index: ext/openssl/ossl_pkey.c
===================================================================
--- ext/openssl/ossl_pkey.c	(revision 22918)
+++ ext/openssl/ossl_pkey.c	(working copy)
@@ -177,7 +177,7 @@
     str = rb_str_new(0, EVP_PKEY_size(pkey)+16);
     if (!EVP_SignFinal(&ctx, (unsigned char *)RSTRING_PTR(str), &buf_len, pkey))
 	ossl_raise(ePKeyError, NULL);
-    assert(buf_len <= RSTRING_LEN(str));
+    assert((long)buf_len <= RSTRING_LEN(str));
     rb_str_set_len(str, buf_len);
 
     return str;
Index: ext/openssl/ossl_ssl.c
===================================================================
--- ext/openssl/ossl_ssl.c	(revision 22918)
+++ ext/openssl/ossl_ssl.c	(working copy)
@@ -905,7 +905,7 @@
         rb_raise(rb_eArgError, "arg must be Time or nil");
     }
 
-    SSL_CTX_flush_sessions(ctx, tm);
+    SSL_CTX_flush_sessions(ctx, (long)tm);
 
     return self;
 }
Index: ext/openssl/ossl_ssl_session.c
===================================================================
--- ext/openssl/ossl_ssl_session.c	(revision 22918)
+++ ext/openssl/ossl_ssl_session.c	(working copy)
@@ -107,7 +107,7 @@
 	if (t == 0)
 		return Qnil;
 
-	return rb_funcall(rb_cTime, rb_intern("at"), 1, LONG2NUM(t));
+	return rb_funcall(rb_cTime, rb_intern("at"), 1, LONG2NUM((long)t));
 }
 
 /*
@@ -126,7 +126,7 @@
 
 	t = SSL_SESSION_get_timeout(ctx);
 
-	return ULONG2NUM(t);
+	return ULONG2NUM((unsigned long)t);
 }
 
 #define SSLSESSION_SET_TIME(func)						\
@@ -147,7 +147,7 @@
 										\
 		t = NUM2ULONG(time_v);						\
 										\
-		SSL_SESSION_set_##func(ctx, t);					\
+		SSL_SESSION_set_##func(ctx, (long)t);					\
 										\
 		return ossl_ssl_session_get_##func(self);			\
 	}