diff --git a/artiq/compiler/transforms/llvm_ir_generator.py b/artiq/compiler/transforms/llvm_ir_generator.py
index 0240d8c61..f416cece5 100644
--- a/artiq/compiler/transforms/llvm_ir_generator.py
+++ b/artiq/compiler/transforms/llvm_ir_generator.py
@@ -340,11 +340,11 @@ class LLVMIRGenerator:
             llty = ll.FunctionType(llvoid, [])
         elif name == "memcmp":
             llty = ll.FunctionType(lli32, [llptr, llptr, lli32])
-        elif name == "send_rpc":
+        elif name == "rpc_send":
             llty = ll.FunctionType(llvoid, [lli32, llsliceptr, llptrptr])
-        elif name == "send_async_rpc":
+        elif name == "rpc_send_async":
             llty = ll.FunctionType(llvoid, [lli32, llsliceptr, llptrptr])
-        elif name == "recv_rpc":
+        elif name == "rpc_recv":
             llty = ll.FunctionType(lli32, [llptr])
         elif name == "now":
             llty = lli64
@@ -359,7 +359,7 @@ class LLVMIRGenerator:
             llglobal = ll.Function(self.llmodule, llty, name)
             if name in ("__artiq_raise", "__artiq_reraise", "llvm.trap"):
                 llglobal.attributes.add("noreturn")
-            if name in ("rtio_log", "send_rpc", "send_async_rpc",
+            if name in ("rtio_log", "rpc_send", "rpc_send_async",
                         "watchdog_set", "watchdog_clear",
                         self.target.print_function):
                 llglobal.attributes.add("nounwind")
@@ -1242,10 +1242,10 @@ class LLVMIRGenerator:
             self.llbuilder.store(llargslot, llargptr)
 
         if fun_type.async:
-            self.llbuilder.call(self.llbuiltin("send_async_rpc"),
+            self.llbuilder.call(self.llbuiltin("rpc_send_async"),
                                 [llservice, lltagptr, llargs])
         else:
-            self.llbuilder.call(self.llbuiltin("send_rpc"),
+            self.llbuilder.call(self.llbuiltin("rpc_send"),
                                 [llservice, lltagptr, llargs])
 
         # Don't waste stack space on saved arguments.
@@ -1257,7 +1257,7 @@ class LLVMIRGenerator:
         # T result = {
         #   void *ret_ptr = alloca(sizeof(T));
         #   void *ptr = ret_ptr;
-        #   loop: int size = recv_rpc(ptr);
+        #   loop: int size = rpc_recv(ptr);
         #   // Non-zero: Provide `size` bytes of extra storage for variable-length data.
         #   if(size) { ptr = alloca(size); goto loop; }
         #   else *(T*)ret_ptr
@@ -1278,12 +1278,12 @@ class LLVMIRGenerator:
         llphi = self.llbuilder.phi(llslotgen.type, name="rpc.ptr")
         llphi.add_incoming(llslotgen, llprehead)
         if llunwindblock:
-            llsize = self.llbuilder.invoke(self.llbuiltin("recv_rpc"), [llphi],
+            llsize = self.llbuilder.invoke(self.llbuiltin("rpc_recv"), [llphi],
                                            llheadu, llunwindblock,
                                            name="rpc.size.next")
             self.llbuilder.position_at_end(llheadu)
         else:
-            llsize = self.llbuilder.call(self.llbuiltin("recv_rpc"), [llphi],
+            llsize = self.llbuilder.call(self.llbuiltin("rpc_recv"), [llphi],
                                          name="rpc.size.next")
         lldone = self.llbuilder.icmp_unsigned('==', llsize, ll.Constant(llsize.type, 0),
                                               name="rpc.done")
diff --git a/artiq/firmware/ksupport/api.rs b/artiq/firmware/ksupport/api.rs
index b01a8a60f..9a86d6ef5 100644
--- a/artiq/firmware/ksupport/api.rs
+++ b/artiq/firmware/ksupport/api.rs
@@ -86,9 +86,9 @@ static mut API: &'static [(&'static str, *const ())] = &[
     api!(watchdog_set = ::watchdog_set),
     api!(watchdog_clear = ::watchdog_clear),
 
-    api!(send_rpc = ::send_rpc),
-    api!(send_async_rpc = ::send_async_rpc),
-    api!(recv_rpc = ::recv_rpc),
+    api!(rpc_send = ::rpc_send),
+    api!(rpc_send_async = ::rpc_send_async),
+    api!(rpc_recv = ::rpc_recv),
 
     api!(cache_get = ::cache_get),
     api!(cache_put = ::cache_put),
diff --git a/artiq/firmware/ksupport/lib.rs b/artiq/firmware/ksupport/lib.rs
index 034e53f8b..ff49d9296 100644
--- a/artiq/firmware/ksupport/lib.rs
+++ b/artiq/firmware/ksupport/lib.rs
@@ -121,7 +121,7 @@ extern fn abort() -> ! {
     loop {}
 }
 
-extern fn send_rpc(service: u32, tag: CSlice<u8>, data: *const *const ()) {
+extern fn rpc_send(service: u32, tag: CSlice<u8>, data: *const *const ()) {
     while !rpc_queue::empty() {}
     send(&RpcSend {
         async:   false,
@@ -131,7 +131,7 @@ extern fn send_rpc(service: u32, tag: CSlice<u8>, data: *const *const ()) {
     })
 }
 
-extern fn send_async_rpc(service: u32, tag: CSlice<u8>, data: *const *const ()) {
+extern fn rpc_send_async(service: u32, tag: CSlice<u8>, data: *const *const ()) {
     while rpc_queue::full() {}
     rpc_queue::enqueue(|mut slice| {
         let length = {
@@ -153,7 +153,7 @@ extern fn send_async_rpc(service: u32, tag: CSlice<u8>, data: *const *const ())
     })
 }
 
-extern fn recv_rpc(slot: *mut ()) -> usize {
+extern fn rpc_recv(slot: *mut ()) -> usize {
     send(&RpcRecvRequest(slot));
     recv!(&RpcRecvReply(ref result) => {
         match result {
@@ -281,7 +281,7 @@ unsafe fn attribute_writeback(typeinfo: *const ()) {
                 attributes = attributes.offset(1);
 
                 if (*attribute).tag.len() > 0 {
-                    send_async_rpc(0, (*attribute).tag, [
+                    rpc_send_async(0, (*attribute).tag, [
                         &object as *const _ as *const (),
                         &(*attribute).name as *const _ as *const (),
                         (object as usize + (*attribute).offset) as *const ()
diff --git a/artiq/test/lit/embedding/async_rpc.py b/artiq/test/lit/embedding/async_rpc.py
index 691a093c3..47c3041a5 100644
--- a/artiq/test/lit/embedding/async_rpc.py
+++ b/artiq/test/lit/embedding/async_rpc.py
@@ -4,7 +4,7 @@
 from artiq.language.core import *
 from artiq.language.types import *
 
-# CHECK: call void @send_async_rpc
+# CHECK: call void @rpc_send_async
 
 @rpc(flags={"async"})
 def foo():