diff --git a/src/V3LinkJump.cpp b/src/V3LinkJump.cpp
index b4b9b56d4..a6ce1d3a2 100644
--- a/src/V3LinkJump.cpp
+++ b/src/V3LinkJump.cpp
@@ -251,6 +251,7 @@ class LinkJumpVisitor final : public VNVisitor {
         // Disable-by-name rewrites kill this detached task-body process, so mark it as process
         // backed to ensure fork/join kill-accounting hooks are always emitted.
         taskBodyp->setNeedProcess();
+        v3Global.setUsesTiming();
         if (taskp->stmtsp()) taskBodyp->addStmtsp(taskp->stmtsp()->unlinkFrBackWithNext());
 
         AstFork* const forkp = new AstFork{fl, VJoinType::JOIN};
@@ -306,6 +307,7 @@ class LinkJumpVisitor final : public VNVisitor {
         // Disable-by-name rewrites kill this detached block-body process, so mark it as process
         // backed to ensure fork/join kill-accounting hooks are always emitted.
         beginBodyp->setNeedProcess();
+        v3Global.setUsesTiming();
         if (beginp->stmtsp()) beginBodyp->addStmtsp(beginp->stmtsp()->unlinkFrBackWithNext());
 
         AstFork* const forkp = new AstFork{fl, VJoinType::JOIN};
diff --git a/src/V3Width.cpp b/src/V3Width.cpp
index dc8b1d95e..2c4c16797 100644
--- a/src/V3Width.cpp
+++ b/src/V3Width.cpp
@@ -8002,6 +8002,7 @@ class WidthVisitor final : public VNVisitor {
                 if (AstNodeFTask* const ftaskp
                     = VN_CAST(m_memberMap.findMember(nodep, "self"), NodeFTask)) {
                     ftaskp->setNeedProcess();
+                    v3Global.setUsesTiming();
                 }
             }
         }