diff --git a/libbacktrace/ChangeLog b/libbacktrace/ChangeLog
index 64832850387..25cd9211980 100644
--- a/libbacktrace/ChangeLog
+++ b/libbacktrace/ChangeLog
@@ -1,3 +1,8 @@
+2017-03-08  Sam Thursfield  <sam.thursfield@codethink.co.uk>
+
+	* btest.c (test5): Replace #ifdef guard with 'unused' attribute
+	to fix compile warning when BACKTRACE_SUPPORTED isn't defined.
+
 2017-01-01  Jakub Jelinek  <jakub@redhat.com>
 
 	Update copyright years.
diff --git a/libbacktrace/btest.c b/libbacktrace/btest.c
index e28a3d83d45..92cb325fdce 100644
--- a/libbacktrace/btest.c
+++ b/libbacktrace/btest.c
@@ -616,7 +616,7 @@ f33 (int f1line, int f2line)
   return failures;
 }
 
-#if BACKTRACE_SUPPORTS_DATA
+static int test5 (void) __attribute__ ((unused));
 
 int global = 1;
 
@@ -686,8 +686,6 @@ test5 (void)
   return failures;
 }
 
-#endif /* BACKTRACE_SUPPORTS_DATA  */
-
 static void
 error_callback_create (void *data ATTRIBUTE_UNUSED, const char *msg,
 		       int errnum)