diff --git a/src/common/diffPositionMapping.ts b/src/common/diffPositionMapping.ts
index 16b0fa66db..ddb8657d68 100644
--- a/src/common/diffPositionMapping.ts
+++ b/src/common/diffPositionMapping.ts
@@ -83,14 +83,14 @@ export function mapNewPositionToOld(patch: string, line: number): number {
 		} else {
 			// Part of the hunk is before line, part is after.
 			for (const diffLine of diffHunk.diffLines) {
-				if (diffLine.newLineNumber > line) {
-					return line + delta;
-				}
 				if (diffLine.type === DiffChangeType.Add) {
 					delta--;
 				} else if (diffLine.type === DiffChangeType.Delete) {
 					delta++;
 				}
+				if (diffLine.newLineNumber > line) {
+					return line + delta;
+				}
 			}
 			return line + delta;
 		}