diff --git a/src/config.h b/src/config.h
index b5c8284a0..c1fcaf6d4 100644
--- a/src/config.h
+++ b/src/config.h
@@ -54,7 +54,7 @@
 #endif
 
 /* Test for backtrace() */
-#if defined(__APPLE__) || defined(__linux__) || defined(__sun)
+#if defined(__APPLE__) || defined(__linux__)
 #define HAVE_BACKTRACE 1
 #endif