diff --git a/src/hotspot/share/code/dependencyContext.cpp b/src/hotspot/share/code/dependencyContext.cpp
index ba2c45e..7027466 100644
--- a/src/hotspot/share/code/dependencyContext.cpp
+++ b/src/hotspot/share/code/dependencyContext.cpp
@@ -35,8 +35,9 @@ PerfCounter* DependencyContext::_perf_total_buckets_allocated_count   = NULL;
 PerfCounter* DependencyContext::_perf_total_buckets_deallocated_count = NULL;
 PerfCounter* DependencyContext::_perf_total_buckets_stale_count       = NULL;
 PerfCounter* DependencyContext::_perf_total_buckets_stale_acc_count   = NULL;
-nmethodBucket* volatile DependencyContext::_purge_list = NULL;
-volatile uint64_t DependencyContext::_cleaning_epoch = 0;
+nmethodBucket* volatile DependencyContext::_purge_list                = NULL;
+volatile uint64_t DependencyContext::_cleaning_epoch                  = 0;
+uint64_t  DependencyContext::_cleaning_epoch_monotonic                = 0;
 
 void dependencyContext_init() {
   DependencyContext::init();
@@ -311,7 +312,7 @@ nmethodBucket* DependencyContext::dependencies() {
 // a purge list to be deleted later.
 void DependencyContext::cleaning_start() {
   assert(SafepointSynchronize::is_at_safepoint(), "must be");
-  uint64_t epoch = SafepointSynchronize::safepoint_counter();
+  uint64_t epoch = ++_cleaning_epoch_monotonic;
   Atomic::store(epoch, &_cleaning_epoch);
 }