diff --git a/src/config.h b/src/config.h
index f38ce872..323a3ddd 100644
--- a/src/config.h
+++ b/src/config.h
@@ -25,7 +25,7 @@
 #endif
 
 /* Test for backtrace() */
-#if defined(__APPLE__) || defined(__linux__)
+#if defined(__APPLE__) || defined(__linux__) || defined(__sun)
 #define HAVE_BACKTRACE 1
 #endif