diff --git a/lib/gpu/atomic_gpu_memory.cpp b/lib/gpu/atomic_gpu_memory.cpp
index 531ea4000d..468a8f4488 100644
--- a/lib/gpu/atomic_gpu_memory.cpp
+++ b/lib/gpu/atomic_gpu_memory.cpp
@@ -114,6 +114,8 @@ void AtomicGPUMemoryT::clear_atomic() {
   time_pair.clear();
   hd_balancer.clear();
 
+  nbor->clear();
+  ans->clear();
   device->clear();
 }
 
diff --git a/lib/gpu/charge_gpu_memory.cpp b/lib/gpu/charge_gpu_memory.cpp
index 412596f5f2..7d37c7823e 100644
--- a/lib/gpu/charge_gpu_memory.cpp
+++ b/lib/gpu/charge_gpu_memory.cpp
@@ -116,6 +116,8 @@ void ChargeGPUMemoryT::clear_atomic() {
   time_pair.clear();
   hd_balancer.clear();
 
+  nbor->clear();
+  ans->clear();
   device->clear();
 }
 
diff --git a/lib/gpu/gb_gpu_memory.cpp b/lib/gpu/gb_gpu_memory.cpp
index 971649c6e8..c71c9753f3 100644
--- a/lib/gpu/gb_gpu_memory.cpp
+++ b/lib/gpu/gb_gpu_memory.cpp
@@ -318,7 +318,9 @@ void GB_GPU_MemoryT::clear() {
     delete gb_lj_program;
     _compiled=false;
   }
-
+ 
+  nbor->clear();
+  ans->clear();
   device->clear();
 }