diff --git a/lib/AlignedAllocator.cc b/lib/AlignedAllocator.cc
index 9df4ec1c..f6d234d5 100644
--- a/lib/AlignedAllocator.cc
+++ b/lib/AlignedAllocator.cc
@@ -13,9 +13,10 @@ void *PointerCache::Insert(void *ptr,size_t bytes) {
 
   if (bytes < 4096 ) return NULL;
 
-#ifdef _OPENMP
+#ifdef GRID_OMP
   assert(omp_in_parallel()==0);
 #endif 
+
   void * ret = NULL;
   int v = -1;