diff --git a/contrib/pg_trgm/trgm_op.c b/contrib/pg_trgm/trgm_op.c
index 32adecc9b82..4ab9e0bcced 100644
--- a/contrib/pg_trgm/trgm_op.c
+++ b/contrib/pg_trgm/trgm_op.c
@@ -48,7 +48,7 @@ _PG_init(void)
 {
 	/* Define custom GUC variables. */
 	DefineCustomRealVariable("pg_trgm.similarity_threshold",
-							 "Sets the threshold used by the %% operator.",
+							 "Sets the threshold used by the % operator.",
 							 "Valid range is 0.0 .. 1.0.",
 							 &similarity_threshold,
 							 0.3,
@@ -60,7 +60,7 @@ _PG_init(void)
 							 NULL,
 							 NULL);
 	DefineCustomRealVariable("pg_trgm.word_similarity_threshold",
-							 "Sets the threshold used by the <%% operator.",
+							 "Sets the threshold used by the <% operator.",
 							 "Valid range is 0.0 .. 1.0.",
 							 &word_similarity_threshold,
 							 0.6,