diff --git a/CHANGELOG.md b/CHANGELOG.md
index 388d1839..24e9bee8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Deprecated
 ### Removed
 ### Fixed
+- Fix resume scan. [#464](https://github.com/greenbone/ospd/pull/464)
+
 
 [Unreleased]: https://github.com/greenbone/ospd/compare/v21.4.3...HEAD
 
diff --git a/ospd/scan.py b/ospd/scan.py
index dada3f92..8e479729 100644
--- a/ospd/scan.py
+++ b/ospd/scan.py
@@ -502,7 +502,17 @@ def get_end_time(self, scan_id: str) -> str:
     def get_host_list(self, scan_id: str) -> Dict:
         """ Get a scan's host list. """
 
-        return self.scans_table[scan_id]['target'].get('hosts')
+        target = None
+        try:
+            target = self.scans_table[scan_id]['target'].get('hosts')
+        except KeyError:
+            LOGGER.warning(
+                '%s: Scan ID is in the scan table, but it was '
+                'not initialized.',
+                scan_id,
+            )
+
+        return target
 
     def get_host_count(self, scan_id: str) -> int:
         """ Get total host count in the target. """