diff --git a/src/Package/Concerns/HasInstallCommand.php b/src/Package/Concerns/HasInstallCommand.php
index 61ba2b3..28a7e29 100644
--- a/src/Package/Concerns/HasInstallCommand.php
+++ b/src/Package/Concerns/HasInstallCommand.php
@@ -77,7 +77,7 @@ public function command(Command $command): int
 
     public function getInstallCommandSignature(): string
     {
-        if (isset($this->commandSignature)) {
+        if (filled($this->commandSignature)) {
             return $this->commandSignature;
         }