diff --git a/marshal.h b/marshal.h
index bcd2b38d..20094289 100644
--- a/marshal.h
+++ b/marshal.h
@@ -141,6 +141,10 @@ struct BinarySink {
     BinarySink_put_data(BinarySink_UPCAST(bs), val, len)
 #define put_datapl(bs, pl) \
     BinarySink_put_datapl(BinarySink_UPCAST(bs), pl)
+#define put_dataz(bs, val) \
+    BinarySink_put_datapl(BinarySink_UPCAST(bs), ptrlen_from_asciz(val))
+#define put_datalit(bs, val) \
+    BinarySink_put_datapl(BinarySink_UPCAST(bs), PTRLEN_LITERAL(val))
 
 /* Emit printf-formatted data, with no terminator. */
 #define put_fmt(bs, ...) \
diff --git a/unix/plink.c b/unix/plink.c
index 446bef21..385fe993 100644
--- a/unix/plink.c
+++ b/unix/plink.c
@@ -774,7 +774,7 @@ int main(int argc, char **argv)
             while (argc > 0) {
                 if (cmdbuf->len > 0)
                     put_byte(cmdbuf, ' '); /* add space separator */
-                put_datapl(cmdbuf, ptrlen_from_asciz(p));
+                put_dataz(cmdbuf, p);
                 if (--argc > 0)
                     p = *++argv;
             }
diff --git a/unix/storage.c b/unix/storage.c
index 7a9585f9..9132eb70 100644
--- a/unix/storage.c
+++ b/unix/storage.c
@@ -557,7 +557,7 @@ bool enum_settings_next(settings_e *handle, strbuf *out)
     fullpath = strbuf_new();
 
     char *sessiondir = make_filename(INDEX_SESSIONDIR, NULL);
-    put_datapl(fullpath, ptrlen_from_asciz(sessiondir));
+    put_dataz(fullpath, sessiondir);
     sfree(sessiondir);
     put_byte(fullpath, '/');
 
@@ -565,7 +565,7 @@ bool enum_settings_next(settings_e *handle, strbuf *out)
 
     while ( (de = readdir(handle->dp)) != NULL ) {
         strbuf_shrink_to(fullpath, baselen);
-        put_datapl(fullpath, ptrlen_from_asciz(de->d_name));
+        put_dataz(fullpath, de->d_name);
 
         if (stat(fullpath->s, &st) < 0 || !S_ISREG(st.st_mode))
             continue;                  /* try another one */
diff --git a/utils/antispoof.c b/utils/antispoof.c
index b3a04ef3..6435944f 100644
--- a/utils/antispoof.c
+++ b/utils/antispoof.c
@@ -11,7 +11,7 @@ void seat_antispoof_msg(InteractionReadySeat iseat, const char *msg)
          * generated by the client, then we can just use the message
          * unmodified as an unspoofable header.
          */
-        put_datapl(sb, ptrlen_from_asciz(msg));
+        put_dataz(sb, msg);
     } else if (*msg) {
         /*
          * Otherwise, add enough padding around it that the server
diff --git a/utils/prompts.c b/utils/prompts.c
index e26ef905..e01dd01c 100644
--- a/utils/prompts.c
+++ b/utils/prompts.c
@@ -34,7 +34,7 @@ void add_prompt(prompts_t *p, char *promptstr, bool echo)
 void prompt_set_result(prompt_t *pr, const char *newstr)
 {
     strbuf_clear(pr->result);
-    put_datapl(pr->result, ptrlen_from_asciz(newstr));
+    put_dataz(pr->result, newstr);
 }
 
 const char *prompt_get_result_ref(prompt_t *pr)
diff --git a/windows/dialog.c b/windows/dialog.c
index a5af31ed..b790f0f4 100644
--- a/windows/dialog.c
+++ b/windows/dialog.c
@@ -889,7 +889,7 @@ static INT_PTR CALLBACK HostKeyDialogProc(HWND hwnd, UINT msg,
                     for (size_t i = 0; ctx->keywords[i]; i++) {
                         if (strstartswith(p, ctx->keywords[i])) {
                             p += strlen(ctx->keywords[i]);
-                            put_datapl(sb, ptrlen_from_asciz(ctx->values[i]));
+                            put_dataz(sb, ctx->values[i]);
                             goto matched;
                         }
                     }
diff --git a/windows/plink.c b/windows/plink.c
index 8dc44c9e..037387e9 100644
--- a/windows/plink.c
+++ b/windows/plink.c
@@ -366,7 +366,7 @@ int main(int argc, char **argv)
             while (argc > 0) {
                 if (cmdbuf->len > 0)
                     put_byte(cmdbuf, ' '); /* add space separator */
-                put_datapl(cmdbuf, ptrlen_from_asciz(p));
+                put_dataz(cmdbuf, p);
                 if (--argc > 0)
                     p = *++argv;
             }