diff --git a/phpBB/includes/acp/acp_board.php b/phpBB/includes/acp/acp_board.php
index 1811748c2f..f2707f15ca 100644
--- a/phpBB/includes/acp/acp_board.php
+++ b/phpBB/includes/acp/acp_board.php
@@ -925,7 +925,7 @@ class acp_board
 		{
 			$user->timezone = new DateTimeZone($config['board_timezone']);
 		}
-		catch (Exception $e)
+		catch (\Exception $e)
 		{
 			// If the board timezone is invalid, we just use the users timezone.
 		}
diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index d7b1b56532..4318b20b97 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -1031,7 +1031,7 @@ function phpbb_get_timezone_identifiers($selected_timezone)
 			$validate_timezone = new DateTimeZone($selected_timezone);
 			$timezones[] = $selected_timezone;
 		}
-		catch (Exception $e)
+		catch (\Exception $e)
 		{
 		}
 	}
diff --git a/phpBB/phpbb/cache/driver/file.php b/phpBB/phpbb/cache/driver/file.php
index b32af32d25..2d538b739c 100644
--- a/phpBB/phpbb/cache/driver/file.php
+++ b/phpBB/phpbb/cache/driver/file.php
@@ -208,7 +208,7 @@ class file extends \phpbb\cache\driver\base
 		{
 			$iterator = new \DirectoryIterator($this->cache_dir);
 		}
-		catch (Exception $e)
+		catch (\Exception $e)
 		{
 			return;
 		}
@@ -259,7 +259,7 @@ class file extends \phpbb\cache\driver\base
 		{
 			$iterator = new \DirectoryIterator($dir);
 		}
-		catch (Exception $e)
+		catch (\Exception $e)
 		{
 			return;
 		}