diff --git a/src/backend/utils/adt/pg_locale.c b/src/backend/utils/adt/pg_locale.c
index 092b620673..dd9c3a0c10 100644
--- a/src/backend/utils/adt/pg_locale.c
+++ b/src/backend/utils/adt/pg_locale.c
@@ -1727,7 +1727,6 @@ get_collation_actual_version(char collprovider, const char *collcollate)
 #endif
 		if (collprovider == COLLPROVIDER_LIBC &&
 			pg_strcasecmp("C", collcollate) != 0 &&
-			pg_strncasecmp("C.", collcollate, 2) != 0 &&
 			pg_strcasecmp("POSIX", collcollate) != 0)
 	{
 #if defined(__GLIBC__)