diff --git a/src/backend/tsearch/spell.c b/src/backend/tsearch/spell.c
index c43c206c0303a7d4c98478457d622e078e2df34c..835851655f5d0db6e03d240b02e85d01c93bf607 100644
--- a/src/backend/tsearch/spell.c
+++ b/src/backend/tsearch/spell.c
@@ -1263,8 +1263,8 @@ NIImportOOAffixes(IspellDict *Conf, const char *filename)
 				else if (STRNCMP(s, "default") != 0)
 					ereport(ERROR,
 							(errcode(ERRCODE_CONFIG_FILE_ERROR),
-						   errmsg("Ispell dictionary supports only default, "
-								  "long and num flag value")));
+						   errmsg("Ispell dictionary supports only \"default\", "
+								  "\"long\", and \"num\" flag value")));
 			}
 		}