diff --git a/docs/en_US/release_notes_4_26.rst b/docs/en_US/release_notes_4_26.rst
index 4b3af8077..312211cde 100644
--- a/docs/en_US/release_notes_4_26.rst
+++ b/docs/en_US/release_notes_4_26.rst
@@ -21,6 +21,7 @@ Housekeeping
 Bug fixes
 *********
 
+| `Issue #4216 <https://redmine.postgresql.org/issues/4216>`_ -  Ensure that schema names starting with 'pg' should be visible in browser tree when standard_conforming_strings is set to off.
 | `Issue #5722 <https://redmine.postgresql.org/issues/5722>`_ -  Ensure that the user should be able to drop the database even if it is connected.
 | `Issue #5748 <https://redmine.postgresql.org/issues/5748>`_ -  Fixed incorrect reverse engineering SQL for Foreign key when creating a table.
 | `Issue #5751 <https://redmine.postgresql.org/issues/5751>`_ -  Enable the 'Configure' and 'View log' menu option when the server taking longer than usual time to start.
diff --git a/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/pg/9.2_plus/sql/nodes.sql b/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/pg/9.2_plus/sql/nodes.sql
index 3cf66474a..78c4f1dde 100644
--- a/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/pg/9.2_plus/sql/nodes.sql
+++ b/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/pg/9.2_plus/sql/nodes.sql
@@ -11,7 +11,7 @@ WHERE
     nsp.oid={{scid}}::oid AND
     {% else %}
     {% if not show_sysobj %}
-    nspname NOT LIKE 'pg\_%' AND
+    nspname NOT LIKE 'pg!_%' escape '!' AND
     {% endif %}
     {% endif %}
     NOT (
diff --git a/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/pg/default/sql/nodes.sql b/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/pg/default/sql/nodes.sql
index d1a19d1a3..a521a3e92 100644
--- a/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/pg/default/sql/nodes.sql
+++ b/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/pg/default/sql/nodes.sql
@@ -11,7 +11,7 @@ WHERE
     nsp.oid={{scid}}::oid AND
     {% else %}
     {% if not show_sysobj %}
-    nspname NOT LIKE 'pg\_%' AND
+    nspname NOT LIKE 'pg!_%' escape '!' AND
     {% endif %}
     {% endif %}
     NOT (
diff --git a/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/ppas/9.1_plus/sql/nodes.sql b/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/ppas/9.1_plus/sql/nodes.sql
index d132fb5a0..6da23892a 100644
--- a/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/ppas/9.1_plus/sql/nodes.sql
+++ b/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/ppas/9.1_plus/sql/nodes.sql
@@ -12,7 +12,7 @@ WHERE
     nsp.oid={{scid}}::oid AND
     {% else %}
     {% if not show_sysobj %}
-    nspname NOT LIKE 'pg\_%' AND
+    nspname NOT LIKE 'pg!_%' escape '!' AND
     {% endif %}
     {% endif %}
     NOT (
diff --git a/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/ppas/9.2_plus/sql/nodes.sql b/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/ppas/9.2_plus/sql/nodes.sql
index d132fb5a0..6da23892a 100644
--- a/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/ppas/9.2_plus/sql/nodes.sql
+++ b/web/pgadmin/browser/server_groups/servers/databases/schemas/templates/schemas/ppas/9.2_plus/sql/nodes.sql
@@ -12,7 +12,7 @@ WHERE
     nsp.oid={{scid}}::oid AND
     {% else %}
     {% if not show_sysobj %}
-    nspname NOT LIKE 'pg\_%' AND
+    nspname NOT LIKE 'pg!_%' escape '!' AND
     {% endif %}
     {% endif %}
     NOT (