diff --git a/src/backend/utils/adt/like_support.c b/src/backend/utils/adt/like_support.c
index 2635050861f..6cd21ba8fed 100644
--- a/src/backend/utils/adt/like_support.c
+++ b/src/backend/utils/adt/like_support.c
@@ -1505,7 +1505,7 @@ pattern_char_isalpha(char c, bool is_multibyte,
 		return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
 	else if (is_multibyte && IS_HIGHBIT_SET(c))
 		return true;
-	else if (locale && locale->provider == COLLPROVIDER_ICU)
+	else if (locale && locale->provider != COLLPROVIDER_LIBC)
 		return IS_HIGHBIT_SET(c) ||
 			(c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
 	else if (locale && locale->provider == COLLPROVIDER_LIBC)