diff --git a/app/assets/javascripts/diffs/store/utils.js b/app/assets/javascripts/diffs/store/utils.js
index 52e04bebfa1831d388e42e91b644e7b9777a1cf6..d74c234c5391e0fd9fa01c856fe5b87a0d906c80 100644
--- a/app/assets/javascripts/diffs/store/utils.js
+++ b/app/assets/javascripts/diffs/store/utils.js
@@ -245,12 +245,14 @@ export function addLineReferences(lines, lineNumbers, bottom, isExpandDown, next
       targetLine = linesWithNumbers[matchLineIndex + 1];
     }
 
-    Object.assign(line, {
-      meta_data: {
-        old_pos: targetLine.old_line,
-        new_pos: targetLine.new_line,
-      },
-    });
+    if (targetLine) {
+      Object.assign(line, {
+        meta_data: {
+          old_pos: targetLine.old_line,
+          new_pos: targetLine.new_line,
+        },
+      });
+    }
   }
   return linesWithNumbers;
 }
diff --git a/spec/frontend/diffs/store/utils_spec.js b/spec/frontend/diffs/store/utils_spec.js
index c5469c1443d0d41797a1aa55ccdf2daa717d3906..d5f8b666d848190af6026caeb68dd4dbb8f53dee 100644
--- a/spec/frontend/diffs/store/utils_spec.js
+++ b/spec/frontend/diffs/store/utils_spec.js
@@ -262,6 +262,17 @@ describe('DiffsStoreUtils', () => {
       expect(linesWithReferences[1].meta_data.old_pos).toEqual(10);
       expect(linesWithReferences[1].meta_data.new_pos).toEqual(11);
     });
+
+    it('should not change meta_data when there is no target line when isExpandDown is not true', () => {
+      const lines = [{ type: MATCH_LINE_TYPE }];
+      const linesWithReferences = utils.addLineReferences(lines, lineNumbers, false, false, {
+        old_line: 10,
+        new_line: 11,
+      });
+
+      expect(linesWithReferences[0].meta_data).toBeUndefined();
+      expect(linesWithReferences[0].meta_data).toBeUndefined();
+    });
   });
 
   describe('trimFirstCharOfLineContent', () => {