diff --git a/postfix/postfix-lib.pl b/postfix/postfix-lib.pl
index 61ae070fb..2d2f22e95 100755
--- a/postfix/postfix-lib.pl
+++ b/postfix/postfix-lib.pl
@@ -2301,7 +2301,6 @@ return 1;
 sub supports_map_type
 {
 local ($type) = @_;
-return 1 if ($type eq 'hash');	# Assume always supported
 if (!scalar(@supports_map_type_cache)) {
 	@supports_map_type = ( );
 	open(POSTCONF, "$config{'postfix_config_command'} -m |");