diff --git a/include/verilated_threads.cpp b/include/verilated_threads.cpp
index 76a6367b0..8258343d6 100644
--- a/include/verilated_threads.cpp
+++ b/include/verilated_threads.cpp
@@ -146,7 +146,7 @@ void VlThreadPool::profileAppendAll(const VlProfileRec& rec) VL_MT_SAFE_EXCLUDES
     }
 }
 
-void VlThreadPool::profileDump(const char* filenamep, vluint64_t ticksElapsed)
+void VlThreadPool::profileDump(const char* filenamep, vluint64_t tickStart, vluint64_t tickEnd)
     VL_MT_SAFE_EXCLUDES(m_mutex) {
     const VerilatedLockGuard lock{m_mutex};
     VL_DEBUG_IF(VL_DBG_MSGF("+prof+threads writing to '%s'\n", filenamep););
@@ -194,14 +194,14 @@ void VlThreadPool::profileDump(const char* filenamep, vluint64_t ticksElapsed)
                         "VLPROF mtask %d"
                         " start %" VL_PRI64 "u end %" VL_PRI64 "u elapsed %" VL_PRI64 "u"
                         " predict_time %u cpu %u on thread %u\n",
-                        ei.m_mtaskId, ei.m_startTime, ei.m_endTime,
+                        ei.m_mtaskId, ei.m_startTime - tickStart, ei.m_endTime - tickStart,
                         (ei.m_endTime - ei.m_startTime), ei.m_predictTime, ei.m_cpu, thread_id);
                 break;
             default: assert(false); break;  // LCOV_EXCL_LINE
             }
         }
     }
-    fprintf(fp, "VLPROF stat ticks %" VL_PRI64 "u\n", ticksElapsed);
+    fprintf(fp, "VLPROF stat ticks %" VL_PRI64 "u\n", tickEnd - tickStart);
 
     std::fclose(fp);
 }
diff --git a/include/verilated_threads.h b/include/verilated_threads.h
index 150168f80..bdb99b816 100644
--- a/include/verilated_threads.h
+++ b/include/verilated_threads.h
@@ -292,7 +292,8 @@ public:
         return &(t_profilep->back());
     }
     void profileAppendAll(const VlProfileRec& rec) VL_MT_SAFE_EXCLUDES(m_mutex);
-    void profileDump(const char* filenamep, vluint64_t ticksElapsed) VL_MT_SAFE_EXCLUDES(m_mutex);
+    void profileDump(const char* filenamep, vluint64_t tickStart, vluint64_t tickEnd)
+        VL_MT_SAFE_EXCLUDES(m_mutex);
     // In profiling mode, each executing thread must call
     // this once to setup profiling state:
     void setupProfilingClientThread() VL_MT_SAFE_EXCLUDES(m_mutex);
diff --git a/src/V3EmitCModel.cpp b/src/V3EmitCModel.cpp
index 334824df1..786207f3c 100644
--- a/src/V3EmitCModel.cpp
+++ b/src/V3EmitCModel.cpp
@@ -435,10 +435,11 @@ class EmitCModel final : public EmitCFunc {
             puts(/**/ "}\n");
             puts(/**/ "else if (vlSymsp->__Vm_profile_window_ct == 0) {\n");
             // Ending file.
-            puts(/****/ "vluint64_t elapsed"
-                        " = VL_RDTSC_Q() - vlSymsp->__Vm_profile_cycle_start;\n");
-            puts(/****/ "vlSymsp->__Vm_threadPoolp->profileDump(vlSymsp->_vm_contextp__->"
-                        "profThreadsFilename().c_str(), elapsed);\n");
+            puts(/****/ "vluint64_t tick_end = VL_RDTSC_Q();\n");
+            puts(/****/ "vlSymsp->__Vm_threadPoolp->profileDump("
+                        "vlSymsp->_vm_contextp__->profThreadsFilename().c_str(), "
+                        "vlSymsp->__Vm_profile_cycle_start, "
+                        "tick_end);\n");
             // This turns off the test to enter the profiling code, but still
             // allows the user to collect another profile by changing
             // profThreadsStart
diff --git a/src/V3Partition.cpp b/src/V3Partition.cpp
index f12a1bce3..6883df7c3 100644
--- a/src/V3Partition.cpp
+++ b/src/V3Partition.cpp
@@ -2711,8 +2711,7 @@ static void addMTaskToFunction(const ThreadSchedule& schedule, const uint32_t th
         // Leave this if() here, as don't want to call VL_RDTSC_Q unless profiling
         addStrStmt("if (VL_UNLIKELY(vlSymsp->__Vm_profile_cycle_start)) {\n" +  //
                    recName + " = vlSymsp->__Vm_threadPoolp->profileAppend();\n" +  //
-                   recName + "->startRecord(VL_RDTSC_Q() - vlSymsp->__Vm_profile_cycle_start,"
-                   +  //
+                   recName + "->startRecord(VL_RDTSC_Q()," +  //
                    " " + cvtToStr(mtaskp->id()) + "," +  //
                    " " + cvtToStr(mtaskp->cost()) + ");\n" +  //
                    "}\n");
@@ -2727,8 +2726,7 @@ static void addMTaskToFunction(const ThreadSchedule& schedule, const uint32_t th
     if (v3Global.opt.profThreads()) {
         // Leave this if() here, as don't want to call VL_RDTSC_Q unless profiling
         addStrStmt("if (VL_UNLIKELY(" + recName + ")) {\n" +  //
-                   recName + "->endRecord(VL_RDTSC_Q() - vlSymsp->__Vm_profile_cycle_start);\n"
-                   + "}\n");
+                   recName + "->endRecord(VL_RDTSC_Q());\n" + "}\n");
     }
 
     // Flush message queue