diff --git a/import.c b/import.c
index e5893c0a..06e7a4ba 100644
--- a/import.c
+++ b/import.c
@@ -905,7 +905,7 @@ static bool openssh_pem_write(
         seq = strbuf_new();
         for (i = 0; i < nnumbers; i++) {
             put_ber_id_len(seq, 2, numbers[i].len, 0);
-            put_data(seq, numbers[i].ptr, numbers[i].len);
+            put_datapl(seq, numbers[i]);
         }
         put_ber_id_len(outblob, 16, seq->len, ASN1_CONSTRUCTED);
         put_data(outblob, seq->s, seq->len);
diff --git a/marshal.c b/marshal.c
index 06f6d631..0ecbd258 100644
--- a/marshal.c
+++ b/marshal.c
@@ -10,6 +10,11 @@ void BinarySink_put_data(BinarySink *bs, const void *data, size_t len)
     bs->write(bs, data, len);
 }
 
+void BinarySink_put_datapl(BinarySink *bs, ptrlen pl)
+{
+    BinarySink_put_data(bs, pl.ptr, pl.len);
+}
+
 void BinarySink_put_padding(BinarySink *bs, size_t len, unsigned char padbyte)
 {
     char buf[16];
diff --git a/marshal.h b/marshal.h
index 400354c4..3c3467d2 100644
--- a/marshal.h
+++ b/marshal.h
@@ -128,6 +128,8 @@ struct BinarySink {
  * rest of these macros. */
 #define put_data(bs, val, len) \
     BinarySink_put_data(BinarySink_UPCAST(bs), val, len)
+#define put_datapl(bs, pl) \
+    BinarySink_put_datapl(BinarySink_UPCAST(bs), pl)
 
 /*
  * The underlying real C functions that implement most of those
@@ -140,6 +142,7 @@ struct BinarySink {
  * declaration(s) of their other parameter type(s) are in scope.
  */
 void BinarySink_put_data(BinarySink *, const void *data, size_t len);
+void BinarySink_put_datapl(BinarySink *, ptrlen);
 void BinarySink_put_padding(BinarySink *, size_t len, unsigned char padbyte);
 void BinarySink_put_byte(BinarySink *, unsigned char);
 void BinarySink_put_bool(BinarySink *, bool);
diff --git a/pageant.c b/pageant.c
index ebd56b03..6c080bea 100644
--- a/pageant.c
+++ b/pageant.c
@@ -269,7 +269,7 @@ void pageant_handle_msg(BinarySink *bs,
 	    MD5Init(&md5c);
 	    for (i = 0; i < 32; i++)
 		put_byte(&md5c, mp_get_byte(response, 31 - i));
-	    put_data(&md5c, session_id.ptr, session_id.len);
+	    put_datapl(&md5c, session_id);
 	    MD5Final(response_md5, &md5c);
 
 	    put_byte(bs, SSH1_AGENT_RSA_RESPONSE);
@@ -1388,7 +1388,7 @@ int pageant_enum_keys(pageant_key_enum_fn_t callback, void *callback_ctx,
 
         fingerprint = ssh2_fingerprint_blob(pubblob.ptr, pubblob.len);
         cbkey.blob = strbuf_new();
-        put_data(cbkey.blob, pubblob.ptr, pubblob.len);
+        put_datapl(cbkey.blob, pubblob);
 
         cbkey.ssh_version = 2;
         cbkey.comment = mkstr(comment);
diff --git a/scpserver.c b/scpserver.c
index 42439159..b61296cb 100644
--- a/scpserver.c
+++ b/scpserver.c
@@ -1133,14 +1133,13 @@ static void scp_sink_coroutine(ScpSink *scp)
             ptrlen leafname = make_ptrlen(
                 p, scp->command->len - (p - scp->command->s));
             scp->filename_sb->len = 0;
-            put_data(scp->filename_sb, scp->head->destpath.ptr,
-                     scp->head->destpath.len);
+            put_datapl(scp->filename_sb, scp->head->destpath);
             if (scp->head->isdir) {
                 if (scp->filename_sb->len > 0 &&
                     scp->filename_sb->s[scp->filename_sb->len-1]
                     != '/')
                     put_byte(scp->filename_sb, '/');
-                put_data(scp->filename_sb, leafname.ptr, leafname.len);
+                put_datapl(scp->filename_sb, leafname);
             }
             scp->filename = ptrlen_from_strbuf(scp->filename_sb);
 
diff --git a/ssh2userauth-server.c b/ssh2userauth-server.c
index d28176ea..465a710f 100644
--- a/ssh2userauth-server.c
+++ b/ssh2userauth-server.c
@@ -107,7 +107,7 @@ static void ssh2_userauth_server_add_session_id(
     struct ssh2_userauth_server_state *s, strbuf *sigdata)
 {
     if (s->ppl.remote_bugs & BUG_SSH2_PK_SESSIONID) {
-        put_data(sigdata, s->session_id.ptr, s->session_id.len);
+        put_datapl(sigdata, s->session_id);
     } else {
         put_stringpl(sigdata, s->session_id);
     }
diff --git a/ssh2userauth.c b/ssh2userauth.c
index 545bf29f..d79ab5bd 100644
--- a/ssh2userauth.c
+++ b/ssh2userauth.c
@@ -570,7 +570,7 @@ static void ssh2_userauth_process_queue(PacketProtocolLayer *ppl)
                  * Save the methods string for use in error messages.
                  */
                 s->last_methods_string->len = 0;
-                put_data(s->last_methods_string, methods.ptr, methods.len);
+                put_datapl(s->last_methods_string, methods);
 
                 /*
                  * Scan it for method identifiers we know about.
@@ -1557,7 +1557,7 @@ static void ssh2_userauth_add_session_id(
     struct ssh2_userauth_state *s, strbuf *sigdata)
 {
     if (s->ppl.remote_bugs & BUG_SSH2_PK_SESSIONID) {
-        put_data(sigdata, s->session_id.ptr, s->session_id.len);
+        put_datapl(sigdata, s->session_id);
     } else {
         put_stringpl(sigdata, s->session_id);
     }
@@ -1643,7 +1643,7 @@ static void ssh2_userauth_add_sigblob(
 	    put_data(substr, sigblob.ptr, sig_prefix_len);
 	    put_uint32(substr, mod_mp.len);
 	    put_padding(substr, mod_mp.len - sig_mp.len, 0);
-	    put_data(substr, sig_mp.ptr, sig_mp.len);
+	    put_datapl(substr, sig_mp);
             put_stringsb(pkt, substr);
 	    return;
 	}
diff --git a/sshecc.c b/sshecc.c
index 6a30d55f..7d7b13da 100644
--- a/sshecc.c
+++ b/sshecc.c
@@ -773,8 +773,8 @@ static void eddsa_openssh_blob(ssh_key *key, BinarySink *bs)
     /* Encode the private key as the concatenation of the
      * little-endian key integer and the public key again */
     put_uint32(bs, priv.len + pub.len);
-    put_data(bs, priv.ptr, priv.len);
-    put_data(bs, pub.ptr, pub.len);
+    put_datapl(bs, priv);
+    put_datapl(bs, pub);
 
     strbuf_free(pub_sb);
     strbuf_free(priv_sb);
@@ -828,7 +828,7 @@ static mp_int *ecdsa_signing_exponent_from_data(
     /* Hash the data being signed. */
     unsigned char hash[MAX_HASH_LEN];
     ssh_hash *h = ssh_hash_new(extra->hash);
-    put_data(h, data.ptr, data.len);
+    put_datapl(h, data);
     ssh_hash_final(h, hash);
 
     /*
@@ -921,9 +921,9 @@ static mp_int *eddsa_signing_exponent_from_data(
     /* Hash (r || public key || message) */
     unsigned char hash[MAX_HASH_LEN];
     ssh_hash *h = ssh_hash_new(extra->hash);
-    put_data(h, r_encoded.ptr, r_encoded.len);
+    put_datapl(h, r_encoded);
     put_epoint(h, ek->publicKey, ek->curve, true); /* omit string header */
-    put_data(h, data.ptr, data.len);
+    put_datapl(h, data);
     ssh_hash_final(h, hash);
 
     /* Convert to an integer */
diff --git a/sshrsa.c b/sshrsa.c
index ae3087bb..7558abdd 100644
--- a/sshrsa.c
+++ b/sshrsa.c
@@ -592,7 +592,7 @@ static unsigned char *rsa_pkcs1_signature_string(
     memcpy(bytes + 2 + padding, asn1_prefix, asn1_prefix_size);
 
     ssh_hash *h = ssh_hash_new(halg);
-    put_data(h, data.ptr, data.len);
+    put_datapl(h, data);
     ssh_hash_final(h, bytes + 2 + padding + asn1_prefix_size);
 
     return bytes;
diff --git a/x11fwd.c b/x11fwd.c
index 3d0356a3..8f8e3972 100644
--- a/x11fwd.c
+++ b/x11fwd.c
@@ -454,7 +454,7 @@ void BinarySink_put_stringpl_xauth(BinarySink *bs, ptrlen pl)
 {
     assert((pl.len >> 16) == 0);
     put_uint16(bs, pl.len);
-    put_data(bs, pl.ptr, pl.len);
+    put_datapl(bs, pl);
 }
 #define put_stringpl_xauth(bs, ptrlen) \
     BinarySink_put_stringpl_xauth(BinarySink_UPCAST(bs),ptrlen)