2 files changed, 3 insertions, 3 deletions
diff --git a/coro.c b/coro.c
index 3c157c8..39774e1 100644
--- a/coro.c
+++ b/coro.c
@@ -88,8 +88,8 @@ coro_init (void)
 
   coro_transfer (new_coro, create_coro);
 
-#ifdef __linux && __elf
-  /* we blindly assume on any __linux with __elf we have a new enough gas with .cfi_undefined support */
+#if __linux && __amd64
+  /* we blindly assume on any __linux with __amd64 we have a new enough gas with .cfi_undefined support */
   asm (".cfi_undefined rip");
 #endif
 
diff --git a/coro.h b/coro.h
index 2f80ee6..399ed1f 100644
--- a/coro.h
+++ b/coro.h
@@ -71,7 +71,7 @@
  * 2009-06-23 tentative win32-backend support for mingw32 (Yasuhiro Matsumoto).
  * 2010-12-03 tentative support for uclibc (which lacks all sorts of things).
  * 2011-05-30 set initial callee-saved-registers to zero with CORO_ASM.
- *            use .cfi_undefined rip on linux-elf for better backtraces.
+ *            use .cfi_undefined rip on linux-amd64 for better backtraces.
  */
 
 #ifndef CORO_H