diff --git a/ext/authx/info.xml b/ext/authx/info.xml
index 59e23c9d37bfe178a321b86fc9b1df21e3948ee1..5aa6742e43a030d8889944a94cd0783261f4384e 100644
--- a/ext/authx/info.xml
+++ b/ext/authx/info.xml
@@ -22,6 +22,7 @@
   </compatibility>
   <comments>AuthX enables remote applications to connect to CiviCRM. Use it to enable and disable different forms of authentication (such as username-password, API key, and/or JWT).</comments>
   <classloader>
+    <psr0 prefix="CRM_" path="."/>
     <psr4 prefix="Civi\" path="Civi"/>
   </classloader>
   <mixins>
diff --git a/ext/civicrm_admin_ui/info.xml b/ext/civicrm_admin_ui/info.xml
index 809957243b367a08e84d8f5c4cc15c3a415c8cca..f41ba1e214c2f940507881ea88c51d7ae74bdbce 100644
--- a/ext/civicrm_admin_ui/info.xml
+++ b/ext/civicrm_admin_ui/info.xml
@@ -26,6 +26,7 @@
   </requires>
   <comments>Replaces legacy pages with configurable Search Display Forms.</comments>
   <classloader>
+    <psr0 prefix="CRM_" path="."/>
     <psr4 prefix="Civi\" path="Civi"/>
   </classloader>
   <civix>
diff --git a/ext/civigrant/info.xml b/ext/civigrant/info.xml
index dd1a9bdf09cdbb028f7a134d2bf09a5153c8d659..ad4b3d84a7565d45440fa3141e0517ddab6e2ac9 100644
--- a/ext/civigrant/info.xml
+++ b/ext/civigrant/info.xml
@@ -24,7 +24,7 @@
     <ext>org.civicrm.search_kit</ext>
   </requires>
   <classloader>
-    <psr0 prefix="CRM_" path=""/>
+    <psr0 prefix="CRM_" path="."/>
     <psr4 prefix="Civi\" path="Civi"/>
   </classloader>
   <upgrader>CRM_Grant_Upgrader</upgrader>
diff --git a/ext/civiimport/info.xml b/ext/civiimport/info.xml
index bb6e89735ec9e41e1e6816070ce19f51cfb85455..1cfac6bb80a9a62bcf7b8e6b2d0a13251c6d354a 100644
--- a/ext/civiimport/info.xml
+++ b/ext/civiimport/info.xml
@@ -26,6 +26,7 @@
     <ext>org.civicrm.search_kit</ext>
   </requires>
   <classloader>
+    <psr0 prefix="CRM_" path="."/>
     <psr4 prefix="Civi\" path="Civi"/>
   </classloader>
   <civix>
diff --git a/ext/ckeditor4/info.xml b/ext/ckeditor4/info.xml
index d88c4523e5734341f3097d6f0806e2ca7ec0ec6a..c4ad58ffa8e4fcefc2fa72f322030e7673d7758e 100644
--- a/ext/ckeditor4/info.xml
+++ b/ext/ckeditor4/info.xml
@@ -22,6 +22,7 @@
   </compatibility>
   <comments>This is the version of CKEditor that originally shipped with CiviCRM core</comments>
   <classloader>
+    <psr0 prefix="CRM_" path="."/>
     <psr4 prefix="Civi\" path="Civi"/>
   </classloader>
   <mixins>
diff --git a/ext/contributioncancelactions/info.xml b/ext/contributioncancelactions/info.xml
index f3386a3ea1b3a008141d6851e907a66d5ace6376..2e3d177114c713fd87c30e9dbdec6d539275cf08 100644
--- a/ext/contributioncancelactions/info.xml
+++ b/ext/contributioncancelactions/info.xml
@@ -22,6 +22,7 @@
   </compatibility>
   <comments>This code has been moved from core to a separate extension in 5.32. Note that if you disable it failed or cancelled contributions will not cause related memberships and participant records to be updated</comments>
   <classloader>
+    <psr0 prefix="CRM_" path="."/>
     <psr4 prefix="Civi\" path="Civi"/>
   </classloader>
   <civix>
diff --git a/ext/elavon/info.xml b/ext/elavon/info.xml
index 19b9c197d4cdb59b8bb6e47177a2595c26d0f2af..e4acbdb3c91a125bf2e82b0c21ab2d75090983cb 100644
--- a/ext/elavon/info.xml
+++ b/ext/elavon/info.xml
@@ -22,6 +22,7 @@
   </compatibility>
   <comments/>
   <classloader>
+    <psr0 prefix="CRM_" path="."/>
     <psr4 prefix="Civi\" path="Civi"/>
   </classloader>
   <civix>
diff --git a/ext/eventcart/info.xml b/ext/eventcart/info.xml
index 88d69ff33891ffbb9c73b4cca9c11b499d887a06..da2e99a7941c2e34be496b1b62f949bfa3935380 100644
--- a/ext/eventcart/info.xml
+++ b/ext/eventcart/info.xml
@@ -22,6 +22,7 @@
     <ver>5.56</ver>
   </compatibility>
   <classloader>
+    <psr0 prefix="CRM_" path="."/>
     <psr4 prefix="Civi\" path="Civi"/>
   </classloader>
   <mixins>
diff --git a/ext/ewaysingle/info.xml b/ext/ewaysingle/info.xml
index 3c298a380cd4e91a8bbc71000a9d4661bef0f2d2..c597c53bf98004b0a534d39cdfd005f912b4ca6b 100644
--- a/ext/ewaysingle/info.xml
+++ b/ext/ewaysingle/info.xml
@@ -25,6 +25,7 @@
   </compatibility>
   <comments>This is an extension to contain the eWAY Single Currency Payment Processor</comments>
   <classloader>
+    <psr0 prefix="CRM_" path="."/>
     <psr4 prefix="Civi\" path="Civi"/>
   </classloader>
   <mixins>
diff --git a/ext/financialacls/info.xml b/ext/financialacls/info.xml
index 09fdf114ac80bed998f12c3faf9e9bc3acdb842a..e8578226b359e025e1fa56cde068812124263a84 100644
--- a/ext/financialacls/info.xml
+++ b/ext/financialacls/info.xml
@@ -25,6 +25,7 @@
   </tags>
   <comments>Financial acls - working towards moving this code to the extension from core</comments>
   <classloader>
+    <psr0 prefix="CRM_" path="."/>
     <psr4 prefix="Civi\" path="Civi"/>
   </classloader>
   <mixins>
diff --git a/ext/greenwich/info.xml b/ext/greenwich/info.xml
index 9e34d6bed126f7e2a2ba0b2b54916542d8a0ce44..27af53f28cdd0ccadba82aec4f33b999ce7cf041 100644
--- a/ext/greenwich/info.xml
+++ b/ext/greenwich/info.xml
@@ -24,6 +24,7 @@
     <ver>5.56</ver>
   </compatibility>
   <classloader>
+    <psr0 prefix="CRM_" path="."/>
     <psr4 prefix="Civi\" path="Civi"/>
   </classloader>
   <civix>
diff --git a/ext/message_admin/info.xml b/ext/message_admin/info.xml
index 16a6d3b9500056d6acc47ecd9063ccedb254918e..d5df5938e8f0e5348ce59eda35fcb9e2ef92fa4b 100644
--- a/ext/message_admin/info.xml
+++ b/ext/message_admin/info.xml
@@ -25,6 +25,7 @@
   </requires>
   <comments/>
   <classloader>
+    <psr0 prefix="CRM_" path="."/>
     <psr4 prefix="Civi\" path="Civi"/>
   </classloader>
   <mixins>
diff --git a/ext/payflowpro/info.xml b/ext/payflowpro/info.xml
index 93f288a37de61f731fdd9572caed02792d04d466..0af800af62476bce9e55e2632113011959b7d1e6 100644
--- a/ext/payflowpro/info.xml
+++ b/ext/payflowpro/info.xml
@@ -22,6 +22,7 @@
   </compatibility>
   <comments>This extension is extraction of the original Core Payflow Pro Payment Processor</comments>
   <classloader>
+    <psr0 prefix="CRM_" path="."/>
     <psr4 prefix="Civi\" path="Civi"/>
   </classloader>
   <mixins>
diff --git a/ext/recaptcha/info.xml b/ext/recaptcha/info.xml
index e424d28d1b4729e71ce0bf3336c586ba508df7d3..bf847ddb81d55efcb50f05c699ce77cbb5648f59 100644
--- a/ext/recaptcha/info.xml
+++ b/ext/recaptcha/info.xml
@@ -22,6 +22,7 @@
     <ver>5.56</ver>
   </compatibility>
   <classloader>
+    <psr0 prefix="CRM_" path="."/>
     <psr4 prefix="Civi\" path="Civi"/>
   </classloader>
   <mixins>