diff --git a/src/lib/str.rs b/src/lib/str.rs
index a20c3f205ab..1d03f768101 100644
--- a/src/lib/str.rs
+++ b/src/lib/str.rs
@@ -7,7 +7,7 @@ export eq, lteq, hash, is_empty, is_not_empty, is_whitespace, byte_len, index,
        str_from_cstr, sbuf, as_buf, push_byte, utf8_char_width, safe_slice;
 
 native "rust" mod rustrt {
-    fn rust_istr_push(s: &mutable str, ch: u8);
+    fn rust_str_push(s: &mutable str, ch: u8);
 }
 
 fn eq(a: &str, b: &str) -> bool { a == b }
@@ -315,10 +315,10 @@ fn pop_byte(s: &mutable str) -> u8 {
     ret b;
 }
 
-fn push_byte(s: &mutable str, b: u8) { rustrt::rust_istr_push(s, b); }
+fn push_byte(s: &mutable str, b: u8) { rustrt::rust_str_push(s, b); }
 
 fn push_bytes(s: &mutable str, bytes: &[u8]) {
-    for byte in bytes { rustrt::rust_istr_push(s, byte); }
+    for byte in bytes { rustrt::rust_str_push(s, byte); }
 }
 
 fn split(s: &str, sep: u8) -> [str] {
diff --git a/src/rt/rust.cpp b/src/rt/rust.cpp
index 86a099c0cc2..25fb9331314 100644
--- a/src/rt/rust.cpp
+++ b/src/rt/rust.cpp
@@ -43,9 +43,9 @@ command_line_args : public kernel_owned<command_line_args>
                            "command line arg interior");
         args->fill = args->alloc = sizeof(rust_vec*) * argc;
         for (int i = 0; i < argc; ++i) {
-            rust_vec *str = make_istr(kernel, argv[i],
-                                      strlen(argv[i]),
-                                      "command line arg");
+            rust_vec *str = make_str(kernel, argv[i],
+                                     strlen(argv[i]),
+                                     "command line arg");
             ((rust_vec**)&args->data)[i] = str;
         }
     }
diff --git a/src/rt/rust_builtin.cpp b/src/rt/rust_builtin.cpp
index 0ed30a8cbf6..a09e7ac1849 100644
--- a/src/rt/rust_builtin.cpp
+++ b/src/rt/rust_builtin.cpp
@@ -40,7 +40,7 @@ last_os_error(rust_task *task) {
     }
 #endif
 
-    rust_vec * st = make_istr(task->kernel, buf, strlen(buf),
+    rust_vec * st = make_str(task->kernel, buf, strlen(buf),
                               "last_os_error");
 #ifdef __WIN32__
     LocalFree((HLOCAL)buf);
@@ -63,7 +63,7 @@ rust_getcwd(rust_task *task) {
         return NULL;
     }
 
-    return make_istr(task->kernel, cbuf, strlen(cbuf), "rust_str(getcwd");
+    return make_str(task->kernel, cbuf, strlen(cbuf), "rust_str(getcwd");
 }
 
 extern "C" CDECL
@@ -127,7 +127,7 @@ vec_from_buf_shared(rust_task *task, type_desc *ty,
 }
 
 extern "C" CDECL void
-rust_istr_push(rust_task* task, rust_vec** sp, uint8_t byte) {
+rust_str_push(rust_task* task, rust_vec** sp, uint8_t byte) {
     size_t fill = (*sp)->fill;
     reserve_vec(task, sp, fill + 1);
     (*sp)->data[fill-1] = byte;
@@ -329,7 +329,7 @@ rust_list_files(rust_task *task, rust_vec **path) {
     HANDLE hFind = FindFirstFile((char*)(*path)->data, &FindFileData);
     if (hFind != INVALID_HANDLE_VALUE) {
         do {
-            rust_vec *str = make_istr(task->kernel, FindFileData.cFileName,
+            rust_vec *str = make_str(task->kernel, FindFileData.cFileName,
                                       strlen(FindFileData.cFileName),
                                       "list_files_str");
             strings.push(str);
@@ -341,7 +341,7 @@ rust_list_files(rust_task *task, rust_vec **path) {
   if (dirp) {
       struct dirent *dp;
       while ((dp = readdir(dirp))) {
-          rust_vec *str = make_istr(task->kernel, dp->d_name,
+          rust_vec *str = make_str(task->kernel, dp->d_name,
                                     strlen(dp->d_name),
                                     "list_files_str");
           strings.push(str);
diff --git a/src/rt/rust_util.h b/src/rt/rust_util.h
index dc8eea20f72..25886aef74b 100644
--- a/src/rt/rust_util.h
+++ b/src/rt/rust_util.h
@@ -189,7 +189,7 @@ inline void reserve_vec(rust_task* task, rust_vec** vpp, size_t size) {
 }
 
 inline rust_vec *
-make_istr(rust_kernel* kernel, char* c, size_t strlen, const char* name) {
+make_str(rust_kernel* kernel, char* c, size_t strlen, const char* name) {
     size_t str_fill = strlen + 1;
     size_t str_alloc = str_fill;
     rust_vec *str = (rust_vec *)
diff --git a/src/rt/rustrt.def.in b/src/rt/rustrt.def.in
index 550155a8345..ef215ce68c8 100644
--- a/src/rt/rustrt.def.in
+++ b/src/rt/rustrt.def.in
@@ -47,7 +47,7 @@ rust_file_is_dir
 rust_get_stdin
 rust_get_stdout
 rust_get_stderr
-rust_istr_push
+rust_str_push
 rust_list_files
 rust_process_wait
 rust_ptr_eq