--- a/libsandbox/libsandbox.c
+++ b/libsandbox/libsandbox.c
@@ -989,4 +989,4 @@ static int check_syscall(sbcontext_t *sbcontext, int sb_nr, const char *func,
 	/* If we get here, something bad happened */
-	sb_ebort("ISE:\n\tabs_path: %s\n\tres_path: %s\n",
-		absolute_path, resolved_path);
+	sb_ebort("ISE:\n\tabs_path: %s\n\tres_path: %s\n\tERRNO: %i\n\tFUNC: %s\n",
+		absolute_path, resolved_path, errno, func);
 }