diff --git a/src/bin/e_signals.c b/src/bin/e_signals.c
index 00b8b264d..df817ce34 100644
--- a/src/bin/e_signals.c
+++ b/src/bin/e_signals.c
@@ -1,5 +1,8 @@
 /*
  * vim:ts=8:sw=3:sts=8:noexpandtab:cino=>5n-3f0^-2{2
+ * NOTE TO FreeBSD users. Install libexecinfo from 
+ * ports/devel/libexecinfo and add -lexecinfo to LDFLAGS
+ * to add backtrace support.
  */
 #include "e.h"
 #include <execinfo.h>