diff -Nru current/say.c new/say.c
--- current/say.c	2022-08-18 17:18:29.000000000 +0200
+++ new/say.c	2022-10-17 23:34:21.199137160 +0200
@@ -336,7 +336,7 @@
 			break;
 		}
 		if (fn && ast_fileexists(fn, NULL, lang) > 0) {
-			ast_str_append(&filenames, 0, (num == 0 ? "%s" : "&%s"), fn);
+			ast_str_append(&filenames, 0, (!ast_str_strlen(filenames) ? "%s" : "&%s"), fn);
 		}
 		num++;
 	}