diff --git a/CHANGELOG.md b/CHANGELOG.md
index a3f149df2a..a9ab44969f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,7 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 
 - Ensure that the list of shared formulae is maintained when an xlsx file is chunked with readFilter[Issue #169](https://github.com/PHPOffice/PhpSpreadsheet/issues/1669).
 - Fix for notice during accessing "cached magnification factor" offset [#1354](https://github.com/PHPOffice/PhpSpreadsheet/pull/1354)
+- Fix uncaught exception when loading files with strange range defs [#1686]
 
 ## 1.15.0 - 2020-10-11
 
diff --git a/src/PhpSpreadsheet/Reader/Xlsx.php b/src/PhpSpreadsheet/Reader/Xlsx.php
index 3a75edf67d..949fc7c0ef 100644
--- a/src/PhpSpreadsheet/Reader/Xlsx.php
+++ b/src/PhpSpreadsheet/Reader/Xlsx.php
@@ -5,6 +5,7 @@
 use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
 use PhpOffice\PhpSpreadsheet\Cell\Hyperlink;
 use PhpOffice\PhpSpreadsheet\DefinedName;
+use PhpOffice\PhpSpreadsheet\Exception as PhpSpreadsheetException;
 use PhpOffice\PhpSpreadsheet\Reader\Security\XmlScanner;
 use PhpOffice\PhpSpreadsheet\Reader\Xlsx\AutoFilter;
 use PhpOffice\PhpSpreadsheet\Reader\Xlsx\Chart;
@@ -1398,7 +1399,16 @@ public function load($pFilename)
                                         $locatedSheet = $excel->getSheetByName($extractedSheetName);
                                     }
 
-                                    $excel->addDefinedName(DefinedName::createInstance((string) $definedName['name'], $locatedSheet, $definedRange, false));
+                                    try {
+                                        $excel->addDefinedName(DefinedName::createInstance(
+                                            (string) $definedName['name'],
+                                            $locatedSheet,
+                                            $definedRange,
+                                            false
+                                        ));
+                                    } catch (PhpSpreadsheetException $exception) {
+                                        continue;
+                                    }
                                 }
                             }
                         }