diff --git a/include/compiler.h b/include/compiler.h
index e15f7a7e..ed5384c7 100644
--- a/include/compiler.h
+++ b/include/compiler.h
@@ -45,6 +45,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 #  define HIDDEN
 #  define PROTECTED
 # endif
+# define WEAK		__attribute__((weak))
 # if (__GNUC__ >= 3)
 #  define likely(x)	__builtin_expect ((x), 1)
 #  define unlikely(x)	__builtin_expect ((x), 0)
@@ -61,6 +62,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 # define ALIAS(name)
 # define HIDDEN
 # define PROTECTED
+# define WEAK
 # define likely(x)	(x)
 # define unlikely(x)	(x)
 #endif
diff --git a/src/mi/backtrace.c b/src/mi/backtrace.c
index bd748aac..b5205356 100644
--- a/src/mi/backtrace.c
+++ b/src/mi/backtrace.c
@@ -76,6 +76,6 @@ unw_backtrace (void **buffer, int size)
 }
 
 extern int backtrace (void **buffer, int size)
-  __attribute__((weak, alias("unw_backtrace")));
+  WEAK __attribute__((alias("unw_backtrace")));
 
 #endif /* !UNW_REMOTE_ONLY */