diff --git a/libco/amd64.c b/libco/amd64.c
index 4db50c4..9beae53 100644
--- a/libco/amd64.c
+++ b/libco/amd64.c
@@ -38,15 +38,11 @@ static thread_local cothread_t co_active_handle = 0;
     0x0F, 0x29, 0xB9, 0x90, 0x00, 0x00, 0x00, 0xFF, 0xE0,
   };
 #else
-#ifndef __APPLE__
-#define TYPE_DECL ".type co_swap, @function\n"
-#else
-#define TYPE_DECL
-#endif
 asm (
       ".text\n"
       ".globl co_swap\n"
-      TYPE_DECL
+      ".globl _co_swap\n"
+      "_co_swap:\n"
       "co_swap:\n"
       "movq %rsp, (%rsi) # Save stack pointer, and pop the old one back.\n"
       "movq (%rdi), %rsp\n"
diff --git a/libco/x86.c b/libco/x86.c
index 57dbeba..e9de521 100644
--- a/libco/x86.c
+++ b/libco/x86.c
@@ -34,7 +34,8 @@ void fastcall co_swap(cothread_t new_thread, cothread_t old_thread);
 #else
 #define ASM_CO_SWAP_DEF \
    ".globl co_swap\n" \
-   ".type co_swap, @function\n" \
+   ".globl _co_swap\n" \
+   "_co_swap:\n" \
    "co_swap:\n"
 #endif