diff --git a/bridge/github/export.go b/bridge/github/export.go
index 21f75cb4179a714a1c31702b99cea9a486a54037..0d2b1e618d04f16433da0ba4b734fe79982006ee 100644
--- a/bridge/github/export.go
+++ b/bridge/github/export.go
@@ -290,7 +290,7 @@ func (ge *githubExporter) exportBug(b *cache.BugCache, since time.Time, out chan
 			} else {
 
 				// case comment edition operation: we need to edit the Github comment
-				commentID, ok := ge.cachedOperationIDs[opr.ID()]
+				commentID, ok := ge.cachedOperationIDs[opr.Target]
 				if !ok {
 					panic("unexpected error: comment id not found")
 				}