diff --git a/ext/pdo_pgsql/pgsql_statement.c b/ext/pdo_pgsql/pgsql_statement.c
index e6499d73a17..4a8d4e11764 100644
--- a/ext/pdo_pgsql/pgsql_statement.c
+++ b/ext/pdo_pgsql/pgsql_statement.c
@@ -188,13 +188,13 @@ static int pgsql_stmt_param_hook(pdo_stmt_t *stmt, struct pdo_bound_param_data *
 			case PDO_PARAM_EVT_EXEC_PRE:
 				if (!S->param_values) {
 					S->param_values = ecalloc(
-							zend_hash_num_elements(stmt->bound_params),
+							zend_hash_num_elements(stmt->bound_param_map),
 							sizeof(char*));
 					S->param_lengths = ecalloc(
-							zend_hash_num_elements(stmt->bound_params),
+							zend_hash_num_elements(stmt->bound_param_map),
 							sizeof(int));
 					S->param_formats = ecalloc(
-							zend_hash_num_elements(stmt->bound_params),
+							zend_hash_num_elements(stmt->bound_param_map),
 							sizeof(int));
 
 				}