diff --git a/libgralloc/alloc_controller.cpp b/libgralloc/alloc_controller.cpp
index c76b31b..1ff19d8 100644
--- a/libgralloc/alloc_controller.cpp
+++ b/libgralloc/alloc_controller.cpp
@@ -115,6 +115,7 @@ int IonController::allocate(alloc_data& data, int usage,
     bool noncontig = false;
 
     data.uncached = useUncached(usage);
+    data.allocType = 0;
 
     if(usage & GRALLOC_USAGE_PRIVATE_UI_CONTIG_HEAP)
         ionFlags |= ION_HEAP(ION_SF_HEAP_ID);
@@ -140,9 +141,10 @@ int IonController::allocate(alloc_data& data, int usage,
         ionFlags |= ION_SECURE;
 
     if(usage & GRALLOC_USAGE_PRIVATE_DO_NOT_MAP)
-        data.allocType  =  private_handle_t::PRIV_FLAGS_NOT_MAPPED;
+        data.allocType  |=  private_handle_t::PRIV_FLAGS_NOT_MAPPED;
     else
         data.allocType  &=  ~(private_handle_t::PRIV_FLAGS_NOT_MAPPED);
+
     // if no flags are set, default to
     // EBI heap, so that bypass can work
     // we can fall back to system heap if
@@ -164,7 +166,7 @@ int IonController::allocate(alloc_data& data, int usage,
     }
 
     if(ret >= 0 ) {
-        data.allocType = private_handle_t::PRIV_FLAGS_USES_ION;
+        data.allocType |= private_handle_t::PRIV_FLAGS_USES_ION;
         if(noncontig)
             data.allocType |= private_handle_t::PRIV_FLAGS_NONCONTIGUOUS_MEM;
         if(ionFlags & ION_SECURE)
@@ -265,6 +267,7 @@ int PmemAshmemController::allocate(alloc_data& data, int usage,
         int compositionType)
 {
     int ret = 0;
+    data.allocType = 0;
 
     // Make buffers cacheable by default
         data.uncached = false;