diff --git a/system/src/Grav/Common/GPM/GPM.php b/system/src/Grav/Common/GPM/GPM.php
index 6c9e7b0e4a..ba63a55a25 100644
--- a/system/src/Grav/Common/GPM/GPM.php
+++ b/system/src/Grav/Common/GPM/GPM.php
@@ -575,10 +575,10 @@ public static function getPackageType($source)
 
         // either theme or plugin
         $name = basename($source);
-        if (Utils::contains($name, 'theme')) {
+        if (Utils::contains($name, 'theme-')) {
             return 'theme';
         }
-        if (Utils::contains($name, 'plugin')) {
+        if (Utils::contains($name, 'plugin-')) {
             return 'plugin';
         }
         foreach (glob($source . '*.php') as $filename) {