diff --git a/src/Query/Concerns/CompilesJoins.php b/src/Query/Concerns/CompilesJoins.php
index ae133e8..56b4ae7 100644
--- a/src/Query/Concerns/CompilesJoins.php
+++ b/src/Query/Concerns/CompilesJoins.php
@@ -20,13 +20,15 @@ public function extractTableAndAlias(Builder $query, $join): array
     {
         if ($join->table instanceof Expression) {
             $tableParts = [];
-            preg_match("/(^.*) as (.*?)$/", (string) $join->table->getValue($query->grammar), $tableParts);
-            $table = $tableParts[1];
-            $alias = $tableParts[2];
 
-            $query->registerTableAlias($join->table, $alias);
+            if (preg_match("/(^.*) as (.*?)$/", (string) $join->table->getValue($query->grammar), $tableParts)) {
+                $table = $tableParts[1];
+                $alias = $tableParts[2];
 
-            return [$table, $alias];
+                $query->registerTableAlias($join->table, $alias);
+
+                return [$table, $alias];
+            }
         }
 
         $table = (string) $this->wrapTable($join->table);
diff --git a/src/Query/Concerns/HandlesAliases.php b/src/Query/Concerns/HandlesAliases.php
index 5a0eee8..4c2357c 100644
--- a/src/Query/Concerns/HandlesAliases.php
+++ b/src/Query/Concerns/HandlesAliases.php
@@ -182,12 +182,13 @@ public function registerTableAlias(string|Expression $table, string $alias = nul
         }
 
         /** @phpstan-ignore-next-line  */
-        if ($alias == null && stripos($table, ' as ') !== false) {
+        if ($alias == null && is_string($table) && stripos($table, ' as ') !== false) {
             $tableParts = [];
-            /** @phpstan-ignore-next-line  */
-            preg_match("/(^.*) as (.*?)$/", $table, $tableParts);
-            $table = $tableParts[1];
-            $alias = $tableParts[2];
+
+            if (preg_match("/(^.*) as (.*?)$/", $table, $tableParts)) {
+                $table = $tableParts[1];
+                $alias = $tableParts[2];
+            }
         }
 
         if ($alias == null) {